1-The best thing to do is to copy all Store licenses you might have.
2-Many VST are not from Cakewalk, will work on... with support and updates.
3-Windows 10 is a great Platform, Cakewalk has so many features, it can be useful for at least more 3 years without feature updates.
4-REASON, CUBASE, PRO TOOLS, all are options with very, VERY different workflow, before migrating , take some time to keep using it.
5-Pull the PLUG, don´t panic about that, the initial letter said they won´t let everybody without license or way to activate it... soo keep it calm, keep it SCREAMING at Twitter and Petition to try a better horizon for a so fabulous software.
6-I am sad, very sad, but life goes on, GIBSON tried a business model to save Cakewalk, it failed hard, we don´t know anything about Cakewalk Team nor real situation, but at least, we still have the latest software.