I'm not expecting new GPU-based coins because ASIC manufacturers can now produce mining hardware for any coin very quickly.
ASICs are more profitable now. If you can't use an ASIC due to noise or high power consumption, then you have to mine with a GPU, and the payback period is 2-3 years.
I don't think so. Even if ASIC mining machines can imitate any algorithm, when a new concept coin emerges, it's impossible for ASICs to appear immediately. First, it will be mined based on CPUs, then GPUs, followed by FPGAs, and finally ASIC mining machines.