^ yeah, I'd say 2012 version is fine (2010 not). Having used it a fair bit though, I'm looking forward to minor changes in 2016 UI (some of which I requested).
TBH, it's mostly UI changes that interest me in upgrades - more often then not the new features are thing I dont use. (This applies to almost all the software I use.)
I still think you're being harsh on Softmaker in particular - as said, this is a problem for all software developers. I'm happy to pay for that "bundle of 3 years of service packs" - no matter how it's dressed up. And let's be honest, no software markets those three years of updates, but many do just that - and much of it very good software (Syncovery comes to mind). The other option is subscription which I dont want. Or free e.g. Libre Office, which, while good, is not up to the compatibility standards I need.