I think the word "supporting" here is doing rather a lot of work -- in this case by "supporting" we'd mean "releasing a new version of the software that is compatible with the backwards incompatible changes introduced by chrome 99".
For most perpetual software licenses I have seen that can be purchased with a single one-off payment, you get a perpetual license for to a single version of the software, which specifically does not include free updates to the latest version.
> feels like at least the life time of a car.
I'll push the car licensing analogy down the road to a slightly ridiculous destination:
Suppose you purchase a diesel powered car, the purchase price includes a lifetime license to use the car (it sounds insane to need to explicitly state this, such is the wonderful world of software licensing) and let's say the purchase price even includes a lifetime warranty for manufacturing defects.
In one year's time, the government introduces new regulation to outlaw diesel cars and require all cars to be converted to run on electricity.
Under the terms of your lifetime license and warranty for your car, would you expect the car manufacturer to convert your diesel powered car to run on electricity?
That is, what if the problem is not that the licensed software product itself has changed but that the surrounding software ecosystem around the software product has changed?
edit: to me it would matter a lot if 1Password6 was sold to you as a software _product_ or an ongoing _service_. If 1Password6 is sold as a software product, then I would have no expectation of free patches or upgrades if it no longer integrated with newer versions of other software owned and changed by other companies. If, on the other hand, 1Password6 sold you a lifetime's subscription to an ongoing service with some guarantees about a minimum level of non-brokenness & availability, then you might reasonably expect them to continue to offer a service that works, no matter if dependencies of their service change. I would be very surprised if they did the latter --- committing to the liability and ongoing costs of offering an ongoing service indefinitely for a single one-off price is usually insane from a business perspective.