@WellErrr I just wanted to say good on you! I commend you for what you are doing. It’s not easy to stick to your guns when the wave of current thought is against you and criticising you.
Every family and child is different and I am sure screens/tablets can be beneficial or even necessary in some setups. But I really think they are overrated in general, and your setup is working fine for you!
I highly doubt your children will be at any sort of disadvantage. They will pick up what they need to.
I think you should just play it by ear, but there’s no need for them to have screens for a long time yet! My child is very young still and I don't know what I'll do in the future re: screens.
I am sceptical of the idea that screens are necessary for good learning for the majority of children. I think they reduce attention span, and then become necessary because of the short attention span, as a self-fulfilling prophesy.
I am a former teacher and do not think having iPads and all-singing, all-dancing interactive powerpoints instead of a whiteboard and pen was of much benefit to the children until they got so accustomed to these they struggled to focus without them.
They will pick up computer skills just fine at school, and if they seem to want to be coding geniuses then you could always reevaluate in the same way you might if a child was very skilled at and keen on a particular sport!
For what it's worth, anecdotally, when I was at secondary school, I and the one other child who didn't have a computer at home were the ones who did best in the end of year exams in y10 which were suddenly sprung on us.
I remember the ICT teacher tutting that I didn't have a computer at home (at the start of the first lesson - it wasn't based on my performance), but I can work a computer, touchtype and even do a little coding absolutely fine.
Stick with what works for you!