[angst_ridden]

The Teensy line is great for folks like me, who are doing one-off projects and who know more about software than hardware. There are good libraries, a helpful developer, and a supportive community. I've used Teensies to make millisecond-accurate camera controllers, radar-triggered music/light-show devices, and burning-man style LED hats. If I were doing production, they'd probably be overkill (and too expensive), but they save me time and effort and are easy to use.

[wolrah]

Yup. I love Teensies for building USB input devices. It's trivial to get something basic working and not much harder to tweak it if you want to appear differently to the system or use a higher refresh rate for lower latency gaming.

They're breadboard friendly, as easy to use as an Arduino, etc. For one-off builds that need lower power or tighter timing than I can achieve with a Pi I pretty much default to looking at the Teensy line unless I need some kind of wireless communications, in which case an ESP variant is usually my choice.