I think it's easier for kids to get hold of a phone at a younger age and become accustomed to it, and don't realise the jank / frustration it introduces when doing certain tasks.

I become unreasonably frustrated when having to search for things on the phone. Buying stuff online is a 'big screen task' not because of the security aspect, but because of needing to compare multiple products, which involve jumping between tabs. I can do that via shift/ctrl-tab, clicking, alt-tab etc - basically a single click. On the phone it's at least 3, and a genuinely grating experience saying nothing of having to copy and paste text for searching.

That said I've come across people that don't know basic copy and paste shortcuts / basic PC literacy, so for those I can see how the phone would feel no less efficient.

I think as kids get older, and their tasks require more digital complexity to complete, they'll slowly migrate towards laptops and larger screen devices (maybe including tablets, maybe not). Basic surfing etc is fine, but there is no way I want to be using even a spreadsheet on a phone - it's a miserable experience - saying nothing of something with genuine complexity like Blender.