Or are they only for buying equipment during the mission and nothing else? Is there any point in not spending them so you can extract with a larger amount?
I got it mixed up. I meant Salvage (English isn’t my native language)
Tech remnants are the meta currency that currently only unlocks more of the expeditions overmap nodes (beta, gamma, etc).
Salvage is in-run for use at the safehouses.
I am curious to know if we can just hold on to tech remnants until map refresh so we can unlock nodes faster IF they put in better modifiers in the future. But I’m willing to confidently bet no. And also that these refreshes will not be fast enough.