Vou postar isso para referência futura por qualquer pessoa que esteja planejando obter suporte da Canon sobre esse assunto.
Entrei em contato com o suporte técnico da Canon no Reino Unido, já que aparentemente a impressora nunca foi vendida nos EUA. O que eu perguntei:
Trying to help a user with an LBP-810. They upgraded to Windows 10 (don't know if it is 32 or 64 bit version). It appears that the latest driver Canon offers is Win 7 32 bit. Is there any way to use the printer with Win 10? (Some type of compatibility mode in Win 10? Win 10 driver for a similar printer that will work, even if limited functionality? Load the driver in a Win 7 32 bit virtual machine running in Win 10? Driver in CUPS that would work in a Linux VM?)
Para ser justo, provavelmente não é realista esperar que um fabricante sugira uma solução na qual seu produto não funcionaria como pretendido. E como estão no negócio para vender impressoras (ou talvez mais precisamente, para vender mecanismos para os quais podem vender suprimentos caros), e é caro continuar a suportar hardware antigo, poucas empresas o ajudarão a tornar suas coisas muito antigas para sempre.
Dito isto, esta é a resposta deles:
Thank you for your request and for contacting Canon.
We are sorry to inform you there are no drivers available for your LBP-810 with Windows 10.
To explain this lack of availability we would like to provide you with some additional information regarding Canon's policy towards the provision of drivers for new operating systems.
At the time of launch of a new product, Canon generally provides drivers so that the product in question will operate on all existing and known future planned operating systems.
When the launch of a new operating system is announced, Canon reviews the existing product range to see which of these products can be considered for the provision of compatible drivers.
There are many different factors that may influence this decision. These can include (but are not limited to) such factors as the technical compatibility between the new operating system and the Canon product, the cost of driver development, the cost of supporting utility software product updates, the issue of certification of the developed driver by the operating system in question, the expected lifetime of the Canon product and costs associated with quality assurance.
Canon respects the right of its customers to decide to upgrade their operating systems and we attempt to make it clear at the time of purchase which products will function on which operating system.
Furthermore, Canon always advises its customers to check the compatibility of their associated Canon products prior to the upgrade of an operating system. To this purpose, our consumer helpdesk staff are always available to assist customers with such enquiries.
We hope that the information above offers enough explanations with regards to the unavailability of the updated driver that you need.
Once again, thank you for having provided feedback on this matter. We appreciate the time and effort it has taken you to do so.
Yours sincerely,
Michael Robinson
Canon Services & Support
Portanto, você ainda está no mesmo lugar em busca de uma solução externa, mas agora você definitivamente sabe que isso não é uma solução para uma solução.