iTerm2 keeps state in this way for all my open tabs, except that it does a new login shell, so my history doesn't stay consistent: they all get the same history after a restart.
Still, not having to open all the terminals I use for different things and resize and position them is a win. It's the small things. :)
Which shell are you using? With fish I find that it's history is somewhat context sensitive based on the present directory. Because of this I've found myself less frustrated when working with the history across multiple tabs.
iTerm2 v3 beta doesn't keep tab state across relaunch for me. The tabs come back but on a fresh command prompt without stdout from the previous session. For me it's no better than starting fresh.
Still, not having to open all the terminals I use for different things and resize and position them is a win. It's the small things. :)