I can identify with the guitar example. I started learning to play in high school, right before internet access became common for average folks in the US (I knew some kids who had CompuServe at home and I was aware of some BBSes, but nothing like today).
I remember going to the music store where they had a room with sound dampening and a giant pedal board hooked up to an amp. Some friends and I would head over after school, guitars in gig bags, and plug in to "try out the pedals". I'm sure the staff loved us since we couldn't really afford to buy them ever. But we got to hear what they all did.
Other times I'd think I invented something, only to realize it had already been done. I had this little headphone-amp that ran off a 9V battery and plugged into the 1/4" jack on your guitar. It was great to play loud (through headphones) and not annoy my family.
But one time, I had some old broken headphones plugged into it and found that I could wedge the driver in the corner of my mouth, play distorted guitar through it, and shape the sounds with my mouth. Do it in front of a mic and whoa! How cool is this??
Later on I learned talkboxes were already a thing. Do you feel like I do, indeed.