Make a new "service and support" plan available to lifetime and perpetual customers and charge $50/yr ($25 / 6 months) for it. Then those who want the additional services can simply renew the more expensive plan. Why force us to give up our licenses?
Yes, you are not 'stripping features' for legacy licensed customers. Instead, you are forcing the 'legacy' customers to give up their licenses in order to use a new service. Unacceptable.