That's strange, cause my MT is a piece of shit.
I would NEVER try to run it on a paying gig even if it was reliable.
Let's me down all the time, but for me it's just a hobby (as is for most here).
And I swear my Sony M1's/D8's all went into standby mode after just pushing record once.
I think that's quite common for Sony products, and not a problem at all once you know how to work the gear. It's actually quite useful as you can check levels without wasting precious CF space, especially
with the 2g split, although that's prolly not a problem with you.
I'm not really sure I understand this post at all, are you just trying to ask for advice on what to do with the defective D50 ? (I'm also not surprised to see it fail in the field ie. all around the world, doing location sound). Or are are you here to argue what gear is worthy to be ran as "production field gear"?... What's the problem again?
Also, a decent rig isn't going to be very noticable when your $900 over anyway.