And this is also why we can't see how well it scales for example. Monero people are against L2's and believe the base layer should be enough, but it would take the age and popularity of Bitcoin to test their beliefs empirically. Conveniently for them it may never happen ;)

As for ASIC resistance, here is a video that talks about RandomX, and what approaches to ASIC resistance preceded it: https://www.youtube.com/watch?v=4Hkd-n1W_e4 TLDR: instructions for a VM are generated randomly, then the miner executes them. So any 'ASIC' would have to be Turing complete, i.e. a full-fledged CPU.