You're absolutely right. Too many open tabs are a bad habit - and a crash will lose them all someday.
But because I've quite got your iron will to close them, I've found one of those pesky tools that does let you file them away into a to-do list.
I've used it since 5 January without losing that list.
But, to prove your point is correct, my to-do list on that one-tab is not getting any shorter...