True wireless earbuds don't necessarily have to end up as electronic waste when their batteries reach the end of their lifespan. Fairphone demonstrates this with the Fairbuds 2, whose batteries can be easily replaced. The earbuds also offer active noise cancellation and support for Sony LDAC.
Only if both your device and your earbuds both support aptX Lossless, which in practice means it almost never gets used because Samsung (holder of most of the market) does not pay for the licence or enable it in their phones, and the Chinese brands only do so for specific tiers and processors.
That is true. Fairphone 6 supposedly supports lossless, but with e/os it only goes to regular aptX. I have yet to try it with different phone to see if I can spot difference.