Telegram owns Whatsapp across the ceiling and down the walls in every aspect (only one I'm not sure about is security and for that one I don't know.) We already converted the inlaws (yep, big family) few months ago and it works like a charm.
An 50 year old electrician was the first to show me Ubuntu back in 2006 and he was enthusiastic about it.
So no, I don't buy it.
Of course many of them will never care, but that is because they don't care, not because there aren't alternatives.
Edit: saw employers mentioned. In that moment we are suddenly talking about professionals who just happens to be friends and family as well. In that case Photoshop might be a good solution.