Me and DH had separate accounts in our early 20's (in the 1990's) and were slagged off by everyone...... separate accounts, separate lives blah blah blah... what is he hiding, how do you know his income, would be a dealbreaker for me...... blah, blah, blah........
In our late 20's we pooled finances, and stopped having separate monies. As soon as we did that, we had people saying .... ooooh that wouldn't do for me having joint accounts, I wouldn't want him having control of MY money (he doesn't!) and I like my money for myself, and I need to have a get-away fund, and don't you find it restrictive?...... Blah blah fucking blah.
So I decided about a decade ago (when I changed jobs and moved areas,) to tell NO-ONE what we do. If anyone has ever asked, I say 'to be honest I'd rather not discuss our finances.' Some people seem a bit irked. No idea why, as it has FUCK ALL to do with them.
But yeah we have had 2 joint accounts for about 15 years now, and would never have it any other way. We both earn roughly the same though, and spend roughly the same. So it's not a problem.
If others want separate accounts, that's fine. People need to stop having a go at people who do things differently to them though. Why does what anyone else does bother you? 
@Antmoon YABU. It's none of your business.