QQ5: edge devs, what is the maximum bookmarks amount before you crash or create problems?

QUESTION (QQ): 5

you maybe should know about the 25-30k problem of icloud sync, the 30-40k problem of different chromium browsers when we want to import bookmarks, now the question is "devs, have you tested such things, do you know where your limits are?"

Same for history, what is the amount of history before you create problems? i hope you avoid the 200-300k limit like apple. is huge annoying apple deletes history. you should be able to keep even 2mio of links.