Volvo has a good reputation in heavy equipment and OTR trucks, but on the marine side, they have one warehouse in the US, and everything has to ship out of there, and the parts prices are high, if the parts are available. A dock neighbor gave up and re-engined his boat because it was on the hard waiting on parts most of the time. He said at least he gets to use it with the different engines, and the older Volvo engines ran some of the time.
Finding a volvo service center is rare. Sure, mechanics may work on them, but they're not volvo trained, which means you pay their rates while they figure it out. I hear that in other parts of the world, it is different, but I don't live there.
Even if you get a new boat with Volvo engines, someday, it will be older, and someone will have to fight the battle getting spare parts...
Speaking of sabre, if you look at YachtWorld sabre, you'll see quite a few Volvo powered boats available. If you watch boats being listed and then sold, you'll see most of them are Cummins powered... A Cummins powered sabre don't last long, compared to the Volvo glut on the market.
While my experiences are not personal, and who knows if it is "current", I saw my friend experience unending pain with his volvo engines and no problems with cummins. This was 15+ years ago, and I still won't go see a volvo powered boat. They wanted to show me the latest Palm Beach boats, and I saw the "powered by Volvo" floor mat and declined.
Others on TF will swear by Volvo engines, but a few TF'ers swear at them. The last thing I wanted to do is find out first hand that the volvo service issues are still a thing.