Curiosity, add a bit of excitement to my life, and I couldn't be sure that the long list of security vulnerability fixes was worth ignoring (or not). Most fixes were for featuresI don't use.
So far both NAS are ok, though I've not had much time to check ... importantly VS is still working. Plus thought I'd test out the betas of Synology Drive 2.0 and Office on the DS215j since I'm only using this as a Hyper Backup target at the mo.
The new Drive has consolidated the previously separate client apps for sync and backup into a single client app, and the the server and share sync packages are now all named Drive ... makes sense and less confusing to the interim mix of interworking Cloud and Drive packages. The only remaining 'Cloud' package will be Cloud Sync for sync'ing, e.g., Dropbox to the NAS.