Things that are soldered can be desoldered and replaced, provided the parts are available. And soldering them to the board has benefits:
- RAM - higher performance because chips are closer to the CPU
- storage - space efficiency
I personally would rather have a slightly thicker laptop and get user replaceable NVMe drives, and memory performance isn't super critical for me, but as long as the parts are available on the market for a reasonable price, I'm satisfied as far as repairability goes.