[aydyn]

Nanopore has a much, much higher error rate and you still need sample extraction / sample prep all the same.

[yreg]

The error rate is low enough for plenty of tasks. E.g. DoctorOetker's goal of finding out how novel the collected genome is.

If you can do the extraction / prep with a briefcase you bring to a jungle, then you can do it on a boat as well.