Early Providers (Cryptic #3)

Hello, I was tired of not having a new puzzle out so I decided to make one! This is actually an idea I had about a year ago, but never got around to finishing it until this month. Making a cryptic is difficult!! The only thing is, I'm not sure why I chose this particular theme for a puzzle, which might not make sense to people under 30. Is it just nostalgia? I think I wanted a puzzle about how things were different at one point and that they continue to evolve, but... does it matter? Unclear. In any case, I asked Joe to look at this, so thank you! Any problems with the clues were pointed out to me and ignored. It's a learning process! Please enjoy! [ .puz ] [ Direct Crosshare link ]