In article ne.com,
Andrew Gideon wrote:

We've a huge investment in satellites. Real on-site repair could be a time
and money saver if done well.

In most, probably all, "repair in space" situations, you can build and
launch a replacement satellite (and throw in some improvements
on the side) for less than -- probably much less than -- the costs of
launching and recovering the manned space vehicle that does the
repairs.