i would just like it noted because this never gets brought up: 90% of people at the time that decision was made were hosting on slate and plate edits. i distinctly remember trying to find map hosted servers and it was like 1% of the list. that definitely played in a little bit
thats fair, i remember someone taking a screenshot of the master server list in the V21 development thread and making the same point.
I imagine Badspot probably wanted to pretty up the game, and figured shadows/shaders were the way to do that. But then realized it was really hard to do with how interiors/terrain were to deal with. I'm sure he was aware of how slate was more popular than maps, so he made the decision to remove them for the sake of the game's continued future. It made sense at the time, but my issue is that it didn't really age well. That bright future sadly never came to fruition.
I just wish that we got more major updates following V21 to make losing maps more worthwhile, at least. Here's some points kompressor made in a QnA

He talks about how staying on torque and removing maps would have given the game a brighter future (even bigger than a new engine, due to the cost of time). I'll admit I don't know very much about game development, but it feels like this statement has not aged very well. Unity continues to expand today, while torque is totally forgotten. Not sure how Torque 3D is doing though. Maybe there's something unique about Torque that warranted Blockland staying on it, I don't know. I have no idea if porting games to other engines is even possible. I imagine it would basically just be remaking the game from scratch, add-ons included. So, not very feasible. I doubt any game dev wants to have to attempt it.
But I can only imagine how much better off blockland might be nowadays if the switch to an engine like Unity or Unreal was made back in 2012.
Komp also mentioned things like an official heightmap generator using bricks, or official BLB tools being possible due to the time saved from not working on interiors/terrain. We got default modter, but I think GSF ghost made those instead of badspot/komp/rotondo, so the "development time saved can be spent on other things" argument doesn't really work there I think. We did get public bricks though, which are cool. But again, blockland didn't really see much content additions to make the removal of maps pay off. There were a lot of patches since then, but not really new content that I can recall.
Again i'm not a game dev, so it's totally possible there's more to this argument that i'm just ignorant of. I hope if badspot ever sees this thread, I'm not annoying him lol