I hope that your Olympus and Sony gear didn't actually stop working when MFT and the A7 series appeared.
In one sense they did. A camera body is a nominal investment compared to a good collection of top notch lenses. Without clunky adapters, neither my pro quality Olympus lenses, nor the Sony/Zeiss A mount lenses would work. Support for repair work (especially with the Sony) all but vanished. Development of and support for 3rd party accessories stopped dead. Did they still make photos? Sure. Did the abandonment of both systems allow my over $20,000.00 investment in professional level lenses take advantage of significant advances in sensor and other technology? Absolutely not. Put it this way, if you had invested a similar amount in Canon or Nikon premium lenses for their FF cameras, and then the company abandoned that lens mount completely, would you be content to go on using a three or four generations old body and feel great about it? I think not. To have this happen once, was unpleasant (Olympus), to have it happen again within a couple of years (Sony) really was a discouragement (that's polite).
I know it isn't rational, but I will never buy another Sony or Olympus camera, ever.
Sorry for the thread digression, but your comment really chapped my hide. Not many admit it "out loud" but at least a part of the profession of photography (and certainly the avocation/hobby) is the satisfaction of "chasing the technology" and seeing large leaps (and incremental increases) in image quality as well as the addition of features and technology that expand what is possible to accomplish photographically.
Rand