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It's official: Smartphones will need to have replaceable batteries by 2027
(www.androidauthority.com)
This is a most excellent place for technology news and articles.
Depends on how important it is to customers. Waterproofing was always just an excuse to seal the case and make repairs harder, and wasn't a feature that the market demanded. We always had waterproof phones for people who needed them. You can seal a battery compartment to IP68 with a bit of effort, and IP44 is essentially what you need to put it in your pocket anyway.
I think all phones should be waterproof to some degree
Would you pay extra for waterproofing? If so how much?
I think all phone lines should have a waterproof option that doesn't have a an easy to remove battery. That way consumers are given the choice at the time of purchase, and the people that want waterproofing are the only ones affected by the repairability tradeoff.