Another voice here
Just because development halts is not a reason you MUST immediately abandon use of working, non-cloud dependent, software.
Why the big push to run apps from the cloud? Because
Installed software does not just stop working when they want to release a
upgrade 
The only cause for abandonment is when YOUR current hardware or OS no longer supports the requirements. (eg. Sigil no longer runs on my older AMD CPU). That box still has other uses (a big container
to hang drives and STORE backup files)