Stardrive (1 & 2) is a 4X game that pushed the boundaries for ship building a few years ago.
It has a few issues, with bug and some annoying features, but if you use the community mod Black Box, it fixes a lot of these. And In my opinion what Stardrive did was pretty groundbreaking, integrating the whole galaxy into one seamless real time map, allowing you to control ships and fleets from one end of the galaxy to the other, simultaneously like a giant RTS game, where each unit is custom built and takes damage by component, and each weapon has an individual firing arc (you do need to use the pause button a lot, if you're serious about micro managing).
Even better than the map though, is the ship building:
And the Mods.
Stardrive 2 does a similar thing, but with a turn based map, simplified ship building, with fewer bugs and a nicer look too:
Full disclosure: I was a moderator on the Stardrive Forum for years. I know I'm biased about this game, but if you play Stardrive1 using the Black Box Mod, it is really good.