The jetpack and the oxygen tank play very important roles in Outer Wilds. For this reason we recommend you always have good reservations of both.
So it is normal that you want to have the ability to transport more to facilitate your trip. However, if you can improve your jetpack or get a bigger oxygen tank in Outer Wilds it is still something completely unknown among the players.
This is why we have set ourselves the task of investigating and doing some tests to determine if the jetpack and the oxygen tank can actually be updated or not.
Checking Out Outer Wilds! - Easy Update