Yeah, I scuba dive and have multiple pieces of equipment with replacable batteries that are good down to 500+ ft. Not only do some of them get opened frequently, and without replacing seals or anything, but they’re also all way cheaper than my phone! Anyone who says you can’t easily meet an IP68 rating on a phone with replacement batteries is full of shit.
Yep, I remember years ago when at a national student aerospace conference, attending a small talk by some guy named Elon Musk about his fairly new company, SpaceX. At this point I think they had only launched one (failed) rocket. He was a bit awkward, but seemed passionate about his Mars vision, and did a great job answering a bunch of technical questions by a group of aerospace engineering students. A lot of us were skeptical of him and his company, but more from the standpoint of aerospace being hard for even the least aspirational companies to succeed in.
Later when I starting hearing more about SpaceX I learned that Elon was also an asshole as a manager, but he still came across at least as being technically competent. And he was great at getting funding and driving excitement in an industry that desperately needed it. While there were already some cracks showing in his public image, it was only around the time of that sub rescue pedo incident where that erratic edgelord and asshole behavior became too much too ignore for myself and other people I know.