I hate bloody cursive font. So yes, I'm biased
When ds1 went through infant school, they learnt to print in Reception, added flicks and bits in Y1 and when they were ready, finally did joined up writing in y2. And it was 'joined up writing' rather than specifically cursive (of the specific cursive variety that seems to be pushed in primary schools currently, rather than the general 'cursive=another term for joined up writing'). He has always had lovely handwriting and as he progressed through junior school and into secondary, it has stayed nice, neat, legible and flows easily.
DS2 on the other hand, followed ds1 through infant school 3 years later. They started them on joined up cursive from day 1 - no printing, no letters with flicks but not actually joined - it was all joined right from the beginning. Likewise, all their printed labels and printed things were printed in a joined up cursive font, all the teachers had to use it for anything they wrote in school - everywhere you looked, apart from books, it was in bloody cursive font...
ds2 struggled from the beginning. He is now in y5 and is still struggling - his handwriting is worse than his brother's was in reception. He has had lots of intervention over the years and still is... but it's not really working and his writing still is painfully slow, illegible and messy - more like a large spider has danced across the page than a pen.
Talking to a friend who is a TA who also had dc that went through the same schools at similar times, she noted that when our first dc went through school and ended up at her junior school, there was a fairly even spread of ability when it came to writing - some excellent, some appalling and a spread through the middle. However, by the time our second dc went through to junior school, having just done joined up cursive writing, there was a large group of dc that had excellent writing, very few in the middle and a significant group at the bottom with really bad handwriting. So there was definitely an effect on those in the middle - lots had much better writing than they would have done otherwise, but lots had much worse...
So while there are definite advantages for some dc, which is apparently why this approach is being pushed, it is also causing significant problems for a lot of children - which only get worse as they move through school, whereas in the old days with non-cursive joined up writing, most dc managed to improve their writing as they got older, which isn't happening for the struggling group any more.
ds2 is definitely being disadvantaged by his poor writing - despite being an excellent student - as the teachers just can't read what he has written and he can't write as quickly as others in his class so can't write enough when told to write a paragraph or whatever. Previously teachers have tried to be reassuring and say not to teach him to print but to persevere with cursive, and that they much preferred to have a messy but creative piece of work than a boring but neat one. But now I'm having to get them to think of better strategies and maybe get permission for a scribe or using a laptop so that he isn't hindered by his writing, which is all a hassle he could do without...
And as for everything being printed in cursive font - completely agree that it is a nightmare to read. I actually complained to the infant school and pointed out that in my job the only time I would ever use the cursive font they used would be as an example of a completely illegible font that should never be used in website / publication design - and yet they were trying to use it to teach reading, when you need things to be extra legible, not the worst example you can find!
So yes, I would keep complaining and saying that actually they need to be able to read and write - cursive can come later. if you have a dc that struggles with it, much better to get them there gently but to get them there, than to leave them struggling for years and potentially significantly delaying their education and ability.. (and thank goodness for ds2 -now at his junior school they don't use cursive font for printed things, so they don't need need to use it for printed things!).
Sorry, that's a bit of a long rant...