Feedback needed - in-browser project demo, for evaluating software

[tellurium]

I work for company that develops a network library with built-in TCP/IP and TLS stack. We want a simple way to let people evaluate the library and its capabilities. We came up with the evaluation page, that allows to build and flash some pre-selected projects completely in browser (Chrome or Edge). Please take a look:

https://mongoose.ws/demo/

This is work in progress. We plan to add many more boards to the supported boards list.
People who have development boards supported by that demo page, can easily flash their boards and see how things work. No toolchain / IDE / whatever is necessary, just a development board.

I would greatly appreciate a feedback on it. Please let me know what you think. Apart from what you have in mind, I'm interested in:

1. Do you find such a demo useful at all
2. What feature you'd like to see (like, live debugging support?)
3. How do you demo your development to prospects / customers ?
4. Would you use a similar demo page for your own projects or within your team for internal references ?

Side note: a "simple" Web UI demo is only 54k on flash on Nucleo-H743ZI - and that's with TLS. RAM footprint is ~17k idle, and few Kb per connection (even with TLS). TLS handshake is < 200ms, though this H7 is fast, 480 MHz.