Assuming if this holds up in the SCOTUS, the #TikTok ban is going to be the first major step in the US government banning any and all non-US services that they don't like and it's going to be very chilling for the #FirstAmendment.
If you're using non-US services right now (like I am with #Proton and #Nextcloud as a example), you should be very concerned even terrified by this ruling.
https://www.theverge.com/2024/12/6/24297454/tiktok-divest-or-ban-dc-circuit-court-appeals