[GraemeJ]

It would seem that the problem with the Lollipop update on Samsung devices is that it is devoid of drivers, other than for Samsung hardware, e.g. a Logitech keyboard won't work, but a Samsung one will.

Something like this has all the indication of Samsung moving towards a proprietary system (like Apple) and I suspect the 'upgrades' that users are asking for might never happen - if you want a hardware keyboard you'll end up having to spring for a Samsung one. This isn't a business model I like, but there's little we can do about it, if that is the case.

Simple solution - DON'T UPGRADE A WORKING SYSTEM!

To my mind, this is so obvious - especially where we are talking about something that is a tool of your trade - but there will always be someone who wants the 'latest and greatest' and will install first and worry about it afterwards.