I feel like this has been a talking point for as long as off-the-shelf printers aimed at hobbyists have existed. Calling them AI factories is a bit off the mark imo, there are plenty of hobbyists that learn CAD and want to make their own stuff, but don't want to build their own printer. The kind of people who are interested in reprap are absolutely still around, and I really don't see that community going dissolving because of the rise of capable commercial printers.
That wasn't exactly what was said...
"it is now popular to just have someone else do it...be it AI or a factory in another country"
And sure there are some people interested in reprap but they have been scattered to the wind. #reprap IRC has become an advertising/support channel for commercial printers. If you go to most of the channels/forums where the development used to happen and mention you want to build a printer you will be flooded with responses about how stupid that is and provided with names/links of the printers you should be buying. Making things is a fool's errand.
Maybe my observations were different...maybe not...but from what I saw at about 2016 the whole DIY machine thing switched.