Gibson hasn't had time to create this situation, if it exists. There's been talk of discontinuing the 4800 for some time (which led to those "the DM line is being discontinued" rumors), and if they are, I think it's probably just because it doesn't sell as well as the 3200. And if they discontinued both consoles tomorrow, they would still support them for years to come. Frankly, I'm surprised I'm running OSX 10.9.
I think it was me that said Gibson just wanted Tascam for digital tech they could build into guitars... The kind of consumer-level iPad kinda stuff cmaffia talks about. The DMs are way past their development I costs now, every one you sell is pure gravy... I think we'll be seeing support for some time.