It makes me sad so see that they waste time on decoration like gif search but they don't have a client I can use on my PC for example.
I honestly don't know if this comment is serious. My girlfriend won't use Signal because it doesn't let her send stickers. This is only a first step in the right direction.
From my own experience the biggest reason is that "my friends are elsewhere". I force my gf to use signal, her mother started to use it too because of that and because she wants to have PC problems solved by me. Same goes for other people that want to interact with me through an communication app like Signal. Other just have to call or write an SMS. Those functions are still there.