A real piano will last 120 years, a digital will last 10.My 1941 Steinway needs a little regulating with a sticky key in the dry winter, but the 1982 Sohmer I bought new has never needed any adjustment. Every 75 years maybe real pianos need regulating. Tuning, yes, but I do that myself. **** pro was tuning 1/4 tone flat, and sold me a useless piano humidifier with my house only 1/2 mile from the Ohio river. There are a lot of **** consoles out there, and some outstanding ones. I play Baldwins in 3 churches, all from the 50's or 60's. One has a sticky key in dry winter weather. I play Wurlitzers in two churches, both are fine. I've tuned 2 of the Baldwins and the one of the Wurlitzers. Nobody else will. I use a tuning fork. I'm not going to tell you what brand to buy since your market is so different, but I hate the sound of the two Yamaha consoles I've heard. The Yamaha grands sound okay, but they should at that price. Kawai consoles and grands sound better IMHO. However, I have such a great choice of premium pianos from $50-$550 (top limit for a 74" grand) I don't see why anybody here would buy new except that the salesman turns women on. Steinway, Baldwin, Wurlitzer, Sohmer, Chickering, Mason & Hamlin,, pre globalization are all great pianos. Story & Clark, Everett, Knabe, Grinell Bros of Detroit are very good. Kimbal wears out fast, the same allegation has been made here of Essex. Winter and Williams are trash, There are other trash pianos, be suspicious of anything with a door for a player mechanism. Count the missing dampers <18 and look to see if the scale allows room to tune top strings without a wedge. Those signs of a premium piano. Inspect used pianos with this regime before involving the tech: https://www.pianostreet.com/smf/index.php?topic=56680.0Happy shopping. My sister-in-law bought one with lions on the casting, pretty case and **** mechanism. Tuning is such a no-big-deal, I'm expecting changing a felt or two is nothing much either. I've already changed two strings, no mystery to that either. Go look at some 15 year old rubber product like a tire, then imagine that as the contacts in your "piano". Felt and maple wood are better materials for a piano. And a spruce soundboard. Make sure your roof is dry and buy above the flood level, a good wood/felt piano should outlast you.
Maybe... maybe not. Wood parts absorb moisture then dry out, then repeat the cycle over and over again. Felt wears out. Soundboards lose their crowns eventually. The piano that actually lasts 100 years is able to do so because much of that piano is NOT 100 years old. And if the soundboard fails... it is probably toast. I have had friends brag about the grand piano they just bought and I would play and just be aghast at the terrible action and weak sound. So, I will agree that a wood/felt piano will make SOUND a hundred years from now whereas a digital will likely have failed due to a breakdown of electronics, but the real piano will not sound like it did when it was new unless major money has been invested in its upkeep.