Two different bets about what a music room needs
Soundtrap bets that the classroom problem is collaboration and management: get thirty students working together in one environment, give the teacher visibility, keep the barrier low. That is a well-chosen bet and the product delivers on it. GOONS bets that the problem is depth: give a student a real wavetable synthesizer, a real turntable and a real vocoder, and let them take each one apart. Which bet is right depends entirely on whether you are teaching composition or teaching sound.
The Chromebook question, which both pass
Neither requires an install, so both work on ChromeOS, on locked-down Windows laptops and on machines where students have no admin rights. That is the single most important practical property of a classroom music tool and it eliminates most of the desktop market immediately. The full argument, including what actually costs CPU on a cheap machine, is on the Chromebook page.
What GOONS would need before a school should standardise on it
Per-seat administration, an education agreement and a way for a teacher to see student work. None of that exists today, and a school buying on the strength of the instrument catalog alone would find the gap in week two. Where it fits now is as a second tool: the place a student who is already producing goes to learn synthesis properly, alongside whatever the department runs for group work. The schools page sets out that split.