Really well done final season. Satisfying, if not happy, endings for all the characters. I don't necessarily agree with all of them, especially Joe's, based on the characters involved, but all the endings were reasonable.
They did a really good job in writing the two teenage Clark daughters. Writing teenagers is difficult, and a lot of shows make them too smart or too one dimensional. Haley was an amazing character, and a great addition to the show.
The show nails what a 90's VC firm was like, although I would have liked them to stretch out the time jumps another few years. The early and mid 90's was a pretty exciting time in the tech industry.
We are really in the Golden Age of television. This show was very good, and yet it never got a sniff of any awards, and if you look at the other shows that were getting nominated, other than maybe the overrated House of Cards and the melodramatic treacle This Is Us, I can't point to any show that Halt and Catch Fire deserved to knock out. HaCF is excellent, but there is a lot of excellent TV.