I absolutely loved Half-Life: Alyx and always recommend it when talking about VR games. Still, I see what they mean about replay value.

I've played Alyx once and fully intend to play it again with developer commentary. Valve's commentary mode is always a treat. But beyond that I don't see myself coming back to it often. Just like with Portal.

On the other hand, I have played through Half-Life 2 quite a few times. Of course, there are also open world games like Breath of the Wild or Skyrim where I have many hundred hours of time spent.

lol this is true, I guess they meant they didn't replay it as much as they'd like to, or those replays weren't as fun, but to me it seems that playing a single player game multiple times over, doing different things each time, seems like pretty darn good replay value.

I’ve put hundreds of hours individually into most of the Fallout games. There are so many side quests and crazy things that can happen, character options, things to explore, ways to accomplish goals that I can keep going back.

I played Final Fantasy VII Remake twice, because they made the game so you can’t get everything by going though just once and I also wanted to get the PS trophies. So I replayed it, though I found it tedious and annoying at times. I don’t remember how many hours I spent but certainly under one hundred.

I’ve replayed all these games, but I wouldn’t say the latter has replay value.

I have thousands of hours in TF2, but less than 50 in Alyx. A game with good replay value has me coming back to play it day after day. A single player game like Alyx is going to have worse replay value, but that doesn't mean I think the game is bad.