Would you rather: insecure SMS in an open-source app, or RCS in Google Messages? (contact won't use Signal)

Trust me, I push Signal hard and even donate to it monthly. As I'm sure many of you know, there are always a few contacts who unfortunately refuse to use it.

In this case: do you prefer to use insecure SMS in something like QUIK SMS or Fossify Messages, or do you prefer to bite the Google bullet to get end-to-end encrypted messages (even if the metadata isn't encrypted)?

I can see good arguments for both sides, so I am curious what Lemmy's take is.