Now that Microsoft has moved to Chromium, HDR mode is finally supported. I was quite frustrated by the lack of support for HDR in the old version. Secondly, although continue where you left off doesn't work, the Recently closed section of history does indirectly show sets previously used. They are listed by the number of tabs that were open in a previous session.
@Elliot Kirk -- I do not use it daily but I have one workstation, one laptop and a Surface Pro 4. Being able to rely on this feature is important to me. It's just as important as OneDrive. No matter what device i use, everything is synced.
Here's a bit more about my setup. The main PC and the Surface Pro are both running Build 18865. If, for some reason, I am having difficulties with a build but need something reliable, then I plug my laptop into my monitor, flip a switch on both my keyboard and mouse, and I'm off to the races.
In conclusion: do I use hystory sunc daily? Nope, but I rely on it very heavily.