I upgraded as soon as Tahoe was generally available. I haven't seen major problems but due to another project I have not used the Mac very much. It's plugged into a docking station and stays up and running but it's been just idling for the most part.

But it handles the dock/undock, sleep, monitor mirroring, external hard drives just fine. During the beta there was a challenging issue with sleep/wake when it is docked but that has been resolved. So from a basic hardware functionality perspective Tahoe is working for me. That is fit and finish you would demand from Apple, but the Thunderbolt 4 dock is from OWC etc.

I haven't tested Electron worker thread issues beyond some light editing in Visual Studio Code. I haven't noticed acute performance problems.

That said, two weeks ago I was doing photo conversion to SVG with OmniGraffle, Affinity Photo and Designer, VSCode, multiple web browsers, five external storage devices... With all that, the system seemed laggy. I was getting irritated by some stupid design decisions the project required and the lag didn't improve my mood. So: totally subjective anecdotes.