One advantage of having separate tabs is that you can make the ones you use infrequently disappear until you need them.
Yes but it is a bit fiddly.
You need to use the Excel Addin Manager (File->Options->Addins->Excel Addins->Go)
That gets you to here
If you uncheck an addin and then close and reopen Excel its tab will disappear (and it will not load when Excel opens) until you check it again.
So if you don’t want to use SpeedTools all the time just uncheck it
To reorder the addin tabs: