I have a LOT of VST plugins, and thanks to new MacOS security (I’m on Mojave) WL9.5 takes 30 minutes (!!) to start up, as it’s scanning VSTs, and something about doing that engages with the new MacOS tccd process. In Activity Monitor, tccd immediately becomes the most CPU intensive process, and even tho Activity Monitor shows it as “only” 50% or so % CPU, the machine becomes extremely slow and laggy to do anything at all.
One could argue this is a tccd MacOS problem, but good luck getting Apple to fix it. IMHO a much better and more expedient solution is to allow WL to bypass VST scanning on startup, both one-time (i.e., start WL whilst holding down a specific key) or permanent via Preferences.