Switch uses ASLR (Address space layout randomization) in the complete user-space (i believe). This is what makes save-game exploits extremly difficult because it is very hard to predict where in memory your save game will be loaded to or where you need to jump.
I think this comment was aimed at playing online, not at going online at all. I highly doubt that Nintendo will ever disallow users to update their Switch just because they are on 1.0.0
Serial: XAJ700158
Serial on device matches serial on box: Did not open Box, but i assume so!
Region: EUR
Firmware: Did not open Box (assumed it would be > 3.0.1)
Color option: Neon
Store: Amazon (DE)
Was a bundle (if yes, which): No (but combined with a hard-copy of BOTW)
Purchase date...