Not sure I agree with all that per say. There are a ton of products that are no longer made, or specifically supported, that remain both easily attainable and sought after. I kinda think the MTS stuff will go the way of Hamer guitars. Arguably some of the best crafted and sounding guitars ever made, relatively unknown (also primarily due to poor marketing), sold new for a significant price, cheap by comparison now (but not cheap really), still desired by those who know them, new musicians finding out about them regularly and seeking them out, others drifting away from them. I think it's a fitting analogy.
Just because the mfg and modders find other things to do, does not mean the existing modules/amps evaporate. They will remain coveted by those that desire versatile tube tone. Actually, supply and demand will dictate that most likely, if the modders get out, prices will rise as there still will be plenty of demand, it'll just all be secondhand. They will continue to be discovered by either new musicians, or more experienced ones that happen to discover them (like myself only a few months ago, and I've always been a gear whore and I had NEVER heard of these). People will come and go, but as long as there is a demand, there will be a market. Maybe not enough for 'new' modules, but there is already quite the existing inventory of stock and modded modules out there. Enough for folks to buy, sell and trade for many years to come.
Now, if the digital stuff ever gets to the point where it can actually get 'that tone' (still a ways to go yet, IMO), then that would make these, and all other tube amps for that matter, obsolete. That's when stuff becomes worthless, lol. Just be sure to sell all your stuff before that point, if/when it comes, lol. Also, dont count out the possibility that some breakthrough, new, music changing instrument of some kind gets invented, possibly rendering all of our stuff obsolete. In this day and age, this is possible at any moment really.
