I think it is simpler. For example phones, it is very hard to find a phone these days that has a user replaceable battery. Phone companies have figured out that if your battery goes bad in three years, instead of paying a shop to replace the battery you are more likely to replace the phone. And they hope that you will be a repeat (profitable) customer.

When I go backpacking, canoeing or kayaking, I really like having the ability to just swap phone batteries when my battery goes down. There is enough room under my phone inside this weatherproof case to hold two spare phone batteries which are user replaceable.



I also bring spare batteries for my camera on such trips.

But bike touring, I can charge up the batteries from my dynohub pass through cache battery, so that is less of an issue. Thus, I bring fewer spares on such trips.