I have a gripe with every Macbook Pro I've owned, and I've owned 4 of them over the last 10 years. They all lag when I type. I hit a key, and it takes a while before it shows up on screen. The effect is at its worst in Safari, but it shows up most everywhere else as well. Sometimes, I'll type a few letters or even words before they start showing up. Doesn't matter if I wipe the machine and reinstall, and Apple has ne…
I have a strange lag problem too. My CapsLock key (mapped to Esc because I am a Doom Emacs User) gets really slow over days. Like in ~4 seconds to register. A reboot fixed the delay. But it degrades again. Happened twice. Thankfully, after the last reboot, it seems to be holding. Last year MBP running Big Sur.
Resetting my bluetooth module and factory resetting all connected bluetooth peripherals helps usually. But it's a pain.