How many Edge browser tabs can you have? After about 4,000 tabs, slowness becomes visible

When I research a topic, or just want to keep handy information quickly available, I like to keep multiple browser windows open, each window for a particular topic. It's very common for me to keep, perhaps, 10 to 15 browser windows open (I use Microsoft Edge browser) and maybe something like few hundred tabs in them in total. With a decent PC and enough RAM, this is not a problem.

But of course, it's nice to know your limits. I tested mine on my secondary PC which has Windows 11, and quite decent Intel CPU (Core i9) and 64 GB of RAM. Then, I just kept opening new browser windows and tabs and never closed anything.

I found that at about 25 browser windows, and around 4,000 tabs (four thousand), switching between tabs, or creating new tabs start becoming very slow, taking perhaps 3-4 seconds or more to go from tab to tab. If you switch to one tab and then back it's faster, but apparently resuming a sleeping tab (the default Edge setting) is the thing that makes it slow. And I still have plenty of RAM left.

So: the practical, still-fluid usage limit with current PCs seems to be about 15-20 browser windows and around 3,000 tabs. Very good already for any practical usage!