This is off-topic, but here I go: D&D was born alongside the age of consumer electronics, and D&D's algorithmic nature was likely a major source of inspiration for CRPGs. When D&D was at the height of its fad in the early '80s, CRPGs were completely unsuitable to replace everything that TTRPGs offered: they were ugly, solo, and highly limiting. Every decade since then, new technology has allowed CRPGs to replicate more aspects of TTRPGs; big, beautiful, social games like WoW were and are a huge threat to the TTRPG market.I wonder about that, though. We're those people "retainable"? There are a number of reasons people play RPGs, and not all of them are common to both MMOs and TTRPGs. For folks who are playing for social reasons, MMOs might very well be able to replace TTRPGs. But if you are playing for story/sandboxy reasons, you may not be satisfied enough to switch to MMOs exclusively. What CRPGs did was fragment a market that was only a single market due to lack of options. When TTRPGs were the only game in town, it's not surprising that it had the player numbers. It's also not surprising that another option that gave gamers the part of the game they wanted would draw them away. They were destined to leave once any diversity of experience occurred.
I used to think CRPGs would eventually just make TTRPGs obsolete as digital games became more powerful. What I hadn't counted on was TTRPGs converging with CRPGs, using digital technology to facilitate TTRPGing. My table uses Roll20 instead of miniatures; I still DM around a table, and my players still roll plastic dice into a box, but when we need to see what the battlefield looks like, we look at the flatscreen TV hanging on the wall. We do it this way because it's fast, cheap, beautiful, and powerful, and that's without using most of its features. Digital tools are making my analog game more fun and engaging.