Heavily skewed because I was almost exclusively playing offline from May through November.
I expect some changes in 2026. Vicky II and EU4 are in particular danger of being replaced by their successors, although Suzerain has an upcoming expansion that may keep it in the Top 10. Beyond that though, it's hard to say. Probably some other new games (maybe even including Civ VII), probably at least one older game being rediscovered, maybe a sequel to a game I used to play, the role that Tropico 4 filled admirably in January and February of this year.
Old World definitely has a chance of reappearing on that list, too, although I'm pretty sure I played it in late 2024, so it's not yet in the "rediscovery" category, but the "rotating in and out" category. I doubt I'll match Dale's 99% Old World stat though

.
177 hours / 546 sessions... yes, I'm a modder
and yes, modding walls reached in less than 2 months on this version.
I've got Transport Fever 2 in my Steam cart, debating if I want to go for it. It looks like it has the timeline progression that I miss from a lot of games that include transportation, and I'm hoping it's not
too fiddly about signaling, I tend to prefer a bit higher-level than games where the player is a signal engineer.
I'm also curious if it has a decent and configurable level of challenge. I found Cities: Skylines (the original, haven't played the sequel) to be too "blank slate, build what you want", and not enough challenge, and am concerned Transport Fever might also be too forgiving. It's a fine balance, but I like for failure to be an option.
But Transport Fever 2 is definitely one that I look at and think, "this might be the transport game that I play the most since the Railroad Tycoon games". Whichever game that ends up being will become one of my favorites.