Trust me, it's not just that I got used to it. I've been using MAME for 19 years and just recently started using bgfx on some games, so I would have noticed. As said by others, it's probably either an option you're using that's helping cause the lag, or your computer isn't powerful enough. BGFX is the most demanding over the others
Windows 11 64 bit OS
Intel Core i7-10700
Nvidia GeForce RTX 2060 6GB
32GB DDR4 RAM