I used to tour on a rig very much like that one. It was great. The late 1980s and early 1990s mountain bikes without suspension systems were extremely durable and they had the gearing which worked admirably on the hills. Bar ends gave me the hand positions I needed. And I could take the bike off-road easily. The only drawback was some of the part sizes had changed over the years. A headset problem could be fixed, but it meant a lot of looking to find the piece I needed.
Why don't I use that bike anymore? Several years ago, a thief decided he needed the bike. I got a great touring bike as a replacement, but I'm still looking for an old school mountain bike for off-road touring and winter use.