Some Tile models don't have replaceable batteries either.

There's a tradeoff in form factor

For something where extremely small size is an essential feature (unlike a laptop computer), battery replaceability is a direct trade off with that.

finally a smart comment. (I never see a company as a friend, companies do not perform acts of kindness, they only seek to grow their profits (except in very rare cases))

There is so much innovation in science that it never materializes because it is not commercially viable for companies.

Don't expect future models to have that feature, though.

Considering some of the tags cost $300+, I guess they had no choice.

Yeah their older keyboards / mice had replaceable AA batteries. I'm saying older but it's only been a few years? Getting to the batteries on the keyboard was a bit of a pain, weird screw cap you needed an insert for to open.