Spine is really lovely. It was great back in 2019 when I used it to release a game. They released the 4.0 version a year later with a lot of updates and while I have no plans to make another 2D side-scrolling type of game... this one piece of software is what makes it tempting.
The thing I REALLY appreciate is the lifetime license. Checking my emails, I bought the professional version in 2015 for $289. Now it's almost a decade later, still getting awesome updates, and I can still get the latest version. Totally unlike the current trend... I'm looking at you, $20 / month for Speedtree.