I don't know about it being dead but definitely not what I thought it would be either.
When we put our previous house on the market in late 2016 the house, shop and yard were all in pristine condition but the house being built in 1990 was an older style of home. Even though I had upgraded windows, carpet, painted, new roof (both house and shop), new furnace and A/C system the house wasn't what people wanted now days. It was the traditional rambler style from that era and although a nice home it carried that compartmentalized feel that they all had back then.
The shop was over the top on electrical, air lines, lighting and all built with the purpose of a working shop, not a "storage shed".
When the house went on the market we had an overwhelming amount of interest but what I found out was that it was the guys coming to look at it because of the shop but the wives were wanting something more modern with the "great room" feel and vaulted ceilings, etc.
When it came down to closing the deal we have three bids, two of them wanted it because of the shop. One couple was young and just starting out but he wanted to work on cars, the other was a middle aged family looking to downsize their huge house and he wanted a shop to be able to work on cars with his two sons who were getting interested in go-kart racing. The third was a couple who had just gone through a bankruptcy two years prior and he couldn't care less about the shop, he just wanted to park his 3 old boats in it.
When it came down to a bidding process the guy who didn't care about the shop offered full asking price as well as closing costs whereas the middle aged family who wanted it because of the shop offered $5k less. I wanted to sell it to them just because they seemed like they would take care of it and appreciate all of the work that went into it. When I was showing him around the shop with the air lines, the power outlets, new furnace, etc. he was very excited.
However, my realtor thought I was leaving $5k on the table and said what does it matter what they do with it once you leave. In the end I sold it to dipshit # 3 who not only didn't care about the shop, he obviously doesn't care about any of it because the house, yard and shop are all deteriorating and falling apart. They now look just like the rest of the white trash in the neighborhood. I kick myself for selling to him but it's out of my control.
I don't know about where you're located but around here detached shop/garages only bring pennies on the dollar in resale. A larger attached garage will bring more in return than a detached, regardless of how nice they are.
I think when it comes right down to it, people like the "idea" of a garage or work shop but won't put in the work to obtain it and even when one is available won't take the plunge financially.