i am asking about download the client and even registering and entering a password
Even getting people to use a different messaging app (such as Facebook Messenger) already installed on their phones is difficult.
I have whatsapp and conversations and that's it. I only use teams on my professional computer, you will never see me install "work" on my personal smartphone and nobody needs a linkedin app, the website is enough.
I agree about LinkedIn and will probably get rid of it; I mostly installed it as I was going to a conference and wanted the easy option for swapping contact details using camera codes.