Regarding welded plate boats; construction and design have changed a massive amount just in the last 10 years or so. Hull shape, deadrise, deck design, etc. have improved quite a lot when combined with modern construction techniques. From personal experience, Eagle/Daigle boats from recent years ride a lot softer and cut through chop way more comfortably than hulls from even a few years ago. Similar experiences with Liquid Metal, Titan, Lifetimer builds.
From what I can see, the hull would ride nicely with how little 'flat' surfaces but by the same token might be harder to get on plane even with the running strakes and be quite a wet ride. The other thing I noticed is that the cabin isn't solid welded construction, looks like the roof is bolted to the hull. Not really a big deal if being used recreationally but would definitely flex and develop rattles over time as well as potentially letting in moisture. Aluminum hulls can indeed last a lifetime but the wiring, interior, and other components are still likely over 30 years old.