As previously announced, there will be file cleanup starting after March 1, 2023. Older routes which have newer versions will be the first candidates for release. If comments are made here indicating why a route version should not be removed, the files will be rescued/retained from removal.
These routes can be viewed at the following link: https://www.trainsim.com/vbts/tslib....dir=descending
This will include several popular Indian routes including the Southern Railways and Western Railways.
If anyone is familiar with those, it's not clear if the Phase 1-3 versions are full replacements or cumulative updates which require the earlier versions.
I'm really hoping someone is able to speak to those before they are removed permanently.