How do you manage all different your webmaster and hosting accounts?

Do you just keep logging out and back in on google? I'm trying to keep my sites on different webmaster/google accounts so I have one set open in chrome then one open in microsoft edge. Haven't expanded into multiple hosting accounts yet. Im about to get firefox so I can have three open without all the logging out/in.

Linking google accounts is easy and you can just click on your icon and select your other account but this pretty much defeats the purpose since obviously google knows your accounts are linked.

Do you diversify your hosting? A couple sites of each niche on different hosts? One niche per host? Lots of different logins and passwords, wondering what you guys do for this.

edit: also do you try to start in one niche only so that all your sites in your pbn can stay relevant?

No need of different hosting accounts, if you have different WMT for each of your domains, it enough.

With PBN my system , I do not create WMT , G very good user monitoring through gmail address