Is it a good idea to occasionally rework older games so that they will run better on modern hardware and OS? Yeah, sure. I can think of a handful of games that would benefit from it. I cannot say Half Life 2 was very high on the list for me. Seems vastly over-hyped......I mean, it's still the same game. Even with RT and whatever fancy modern visual effects you want to throw at it, it is still not going to be anything new. I felt the same way about the quake rt remakes, and I am a huge Quake and all things id fan.
i really don't get the fervor, but whatever. Not hurting anyone......beats playing any of the new games (all the new games i am hoping for seem to get stuck in pre-release limbo and die).