When I see them in the literature and in use elsewhere I'll be a believer. The prices were cheap enough. If I go to my local electronics outlet and see them I might buy a few. The true measure of success is if they are used commercially. If not, I have to ask why.

There are plenty of current devices that go to 4Mhz and beyond. You have a commercial device that goes to 100Mhz people will use them, technology isn't important (through price will count).

Beginners don't like SMT, but there are plenty of advanced users who do. They are a minority to be sure, but they are out there. I've build my share (mostly kits), they aren't hard to hand solder. A quick question, how many electronics projects have you designed, and how many have you built (including kits)? I tended towards around 5-20 per year, though my pace dropped when I was let go (they closed the factory) and has picked up since I joined this site and started writing, bringing it back up to where I used to be. Ten years ago a lot of it was professional, when I was a lead tech for Alcatel and Rockwell International.

 

Agreed. Just like that 10KHz op-amp. Pretty much useless for audio. But maybe it would be used in a multimeter, or a temperature probe, due to its low power consumption and low input current.

Exactly, modern analog design is mostly relegated to sensors and transducers and front-ends for various analog inputs.
There's also a huge push for small portable devices.

To add to the FET vs BJT confusion with IC design you also have available a huge amount of tools to correct problems with a circuit that you don't have in the discrete world.
For example many components undergo laser trimming to remove offsets.
In general your transistors will be very closely matched both in performance parameters and thermally.
You can still achieve very large gains and good bandwidth with MOSFETs you just need to work at it a bit harder. Since in an IC transistors are essentially free (you almost never use resistors because they end up larger) you can make very complex circuits to compensate for all sorts of problems.

IC design is a very different concept making the tradeoffs between devices a very interesting discussion.

Edit:

@Bill: I really don't mean to be rude about this but I don't like to share credentials or experience. I truly believe in words speaking for themselves.