Background: we're in the middle of migrating a large SaaS app to React but won't finish in time (by far) until end of 2021. This is partly caused due to additional regulations we have to implement and partly due to starting way too late with the migration.
We're researching the options we have, so if any of you was/is in the same situation and could provide a few insights in what you did and how it turned out, we'd greatly appreciate that.