Re: 6.0 "soon"... riiight.
Since when was any manufacturer responsible for updates?
You bought the phone with version x.yy.z
This expectation of ongoing updates and patches is typical of the selfish whining monkeys that have become so prevalent in recent years.
It is not unreasonable to expect updates in any computerised equipmenT (be it bugfixes, security fixes or functional enhancements). Most manufacturers offer updated firmware for their kit (not talking about phones here).
Also some manufacturers already advertise on release of the product that it will get x.y.z update, in which case it seems perfectly reasonable to me to expect that update to be provided as it quite likely influenced your original purchasing decision.
That reminds me. I'm off to the garage to demand that the manufacturer drops the latest, more powerful and more efficient engine into my car.
They're not replacing the phone's CPU over the air are they. More like you're off to the garage to get your ECU firmware sorted for dodgy emissions controls.