I am not comfortable that signal depends on prosperitary google library. However, I find that Molly lags significantly behind signal (around 1 to 2 weeks, so maybe not as significant as I thought), but I am just concerned that if there is a security fix in signal, molly will not be able to react as fast.
I am also quite frustrated with the general lack of communication from the signal team (for example the lack of communication regarding username). I doubt they will have the good will to help molly when there is a critical security fix.
It is frustrating that signal no longer seems like the gold standard for privacy any more; unfortunately, all my friends are on there (ironic, isn’t it…).
I’ve been using it for close to a year because I can’t link Signal to my desktop using QR code, Molly allows to provide the link directly and thus I use it. Everything works great.