it would be really crappy of them to take over a division and screw over many Marlin owners over an acquisition?
It was crappy of Marlin to find itself in such a poor financial state that it could be acquired by non-firearms, distressed investment venture capitalists. It was crappy of Marlin and Remington to run a great American legacy brand into the ground through multiple bankruptcies. Ruger, another great American brand which has carved out its own legacy, capitalized on an opportunity to save Marlin by purchasing it out of bankruptcy, committed to transferring tooling, developing skills, and employing additional American workers to breath new life back into the Marlin brand, and God and Ruger willing, provide stability and consistency in its future, rather than letting it melt into obscurity (cough, cough, Bushmaster, cough, DPMS, cough, Remington). Why should they be expected to honor the burden of someone else’s poor manufacturing or poor QC/QA, even as long as over a hundred years ago?
You can look at other legacy brands and see the same behavior. Savage doesn’t touch anything produced prior to a few decades ago, nor does Springfield. Taurus largely only takes on warranty claims for products for which they have records, which is only back to the 1990s in many models. Ruger won’t service their Sec/Speed/Serv 6 lineup as they no longer have parts inventory or laborers familiar with the design, nor do they service their lever actions or shotguns, or even (most if not all of) their famed P-series. Nikon isn’t servicing or warranting any of their riflescopes any longer. Sig doesn’t service discontinued models even only a few years out of production... If a company can’t warranty a product, even their own, then they simply can’t. Ruger shouldn’t be expected to clean up Remington’s manufacturing and QC/QA messes any more than they’ve already committed by resurrecting the brand under their own horsepower. Frankly, the sheer volume of existing Marlin market to support would be overwhelming - warranty calls could easily swallow up a couple YEARS of early parts production, sucking away potential new product sales, with no upside revenue.
Am I itchy that none of my many Marlins have any warranty any longer? A little. But honestly, I wouldn’t have sent much back to Remington or Marlin for work before, so I wouldn’t send it back to Ruger now either. I expect Ruger will (eventually) catch up on parts inventory and will (eventually) live their typical generous life with customers to provide parts when called as they do for their existing models, and I do expect the Marlin designs will be held true at least in most ways to allow backwards compatibility. But the parts market for Marlins is already huge, so I’m not stressing much over any wear and tear and normal repairs I may need to do for my Marlins, with or without Ruger’s backstop.