Originally posted by HopelessTogger SDM would be handy. But this is a worst case scenario. I have so much invested in Pentax glass, if they did go pop I couldn't rebuild a system, certainly not to the same extent.
That is why they have us by the throat..
We started off buying an entry camera and maybe a kit lens. Over much time, the kit lens turned into some nice primes and/or a couple fast zooms... and an upgraded body... and a flashgun... and maybe one or two more... and accessories. The house has become full.
Where if one wants to change systems, they have to recreate their arsenal at once to have the same level of robustness. We grow to expect what we have to stay as it is..
For a commercial shooter, this is largely a non-issue.. they'll write the expenditure off since they need it to do their job and will only switch when the decision is more profitable for them.
For everyone else, it can become a costly adventure.. or nightmare.. largely simply for pleasure/hobby.
This market is so varied and unknowable right now.. Canon looks strong, but are they and for how long? Nikon is said to be badly injured, will they change direction or be bought out? Pentax has long been associated with gloom and doom... and, in some cases, probably rightfully so (being bobbled around corp to corp).
One doesn't want to end up on the sinking ship when it goes down.. and probably also why Sigma and Tamron seem to announce their more recent lenses only for Canon and Nikon mounts. Those are seemingly safer bets to make versus the Pentax or the Olympus of the camera world.