Abandonware should not be copyright-protected. The process of business dissolution should require sending a copy of all proprietary source-code to customers (as

Abandonware should not be copyright-protected. The process of business dissolution should require sending a copy of all proprietary source-code to customers (assuming the business was not acquired / there is no new owner of the source code), and businesses that refuse to support legacy software with no upgrade path should be liable to provide the source code to such customers. I don't think right-to-repair for commercially supported software makes sense. If you care about the right to modify and rebuild, put source access into the contract. But you have a commercial relationship, so the vendor is supposed to listen to your feature and bugfix requests. If they're unwilling to consider source access or feature/bugifx requests, don't buy from them, it sounds like they don't care about your business.