Android update are slow?
Sorry, but stating that Android updates dribble out slowly is being generous! The fragmented update scene is more like an army of snails, all with a severe limp, advancing towards the besieged and vulnerable phones and tablets. Most won't make it, and those that do will be too late; the war will be over and the device will either have been hacked, rooted or bunged in the bin.
Say what you will about Microsoft's attitudes concerning updates, but at least you can get them (whether you want them or not). Google's method of giving updates to manufacturers instead of directly may result in better update testing but can result in vast delays and in a lot of cases no updates being issued at all for even slightly older devices.
I don't know the solution to this, but then again what do my views matter? I'm just a user. I'm not making £millions.