There are consistent rules that are written out pretty verbosely. This can be scary at first but also ‘generally’ prevents a lot of table discussion. There are tons of characters choice and it is pretty hard to make a low power/high power character; also encounter/monster building rules actually work. Price of this is that there are a lot of options that were balanced out of their fun. Thankfully they have been getting better at this.
Personally I think 5e sits at a weird point. There are games like PF2, 13th Age, etc. that deliver better gaming frameworks with depth and there are better ‘simple’ games like WWN and numerous retroclones that provide the bare minimum and empower GM to improvise. Where as 5e has had an approach more like the former to the rules interpretation and character complexity, with tons of unofficial official rules clarifications and specific character, while having the actual rules written out more like the latter group providing very little guidance to how to use them. It awes with fun abilities yet provides little on how they interact. It is not a bad game if the GM knows what they want out of it, but most games I have been in was a disparate mix of ‘things others do’. A lot of the blame lies with the DMG.
I don’t really think it is possible. FATE rules do not contain a game in a traditional sense and the game itself is created during play via Aspects. A computer game that attempts to do FATE right would just end up with a FUDGE adaptation. Maybe when the LLMs are much better…