it is. And especially for SMBs, the cost was way less in the past. Imagine a small mechanical engineering company: 10 years ago they'd have 5 seats of a 5 year old AutoCAD/ProEngineer/Solidworks version, sneakily locking them in but basically no recurring costs. If a new customer needed a new version, they bought one seat for that and kept the old ones, gradually upgrading. Nowadays they pay half the single-seat cost per year because of "continouus updates" (for the UI mainly, so that they can sell trainings)