Honestly I do on a regular basis. Also that doesn't sound like a lot for a browser to maintain. Imagine opening most links in a new tab. That's how it happens and that's me.
As you can see from https://www.youtube.com/watch?v=7iwgyzX-76g the browser becomes completely unusable with a few thousand tabs, and the experience is massively degraded way before that.
You also would run out of RAM way before opening 4,000 tabs, with most consumer boards supporting only a maximum of 128GB of RAM.
Before you continue digging this hole you should consider web browsers don't load all old tabs on startup. I have definitely had 2000+ tabs open and that didn't even slow down the browser as usually less than 100 or so are loaded at a time. I basically use tabs as bookmarks.
Note that I use Firefox and not Chrome, and my tab usage is one of the reasons.
I don't know a way to check the exact number, but I'm 100% sure I'm over 2,000 tabs.
At work now so can't check but my PC at home has 64Gb RAM and up to half of that is used by Firefox.
I've noticed it gets unresponsive over 160 windows. I currently have 156 open (it tells you the number when you exit Firefox. Each of those windows has at least 20 tabs.
Firefox is good for an excessive number of tabs because it only loads the tabs when you activate them. Chrome is a memory hog.
As you can see from https://www.youtube.com/watch?v=7iwgyzX-76g the browser becomes completely unusable with a few thousand tabs, and the experience is massively degraded way before that.
You also would run out of RAM way before opening 4,000 tabs, with most consumer boards supporting only a maximum of 128GB of RAM.