Of course, your mods will stop working because the Sims Team didn't create the mods. Mods are made by other people of the community outside of the Sims Team, who have to keep up with the updates of the game and update their mods to go with it. The Sims Team have been giving notice to mod players to download new mod updates before gameplay during their own updates on platforms like EA app and Steam because the mods are not originally part of the game and the Sims Team did give notice that outdated mods will stop working properly. Unless the mod creators become a part of the Sims Team, where they work to update mods at the same time, your problem has no further solution on their side. As soon as there is a new update to the game, the mod creators then get the update and work hard to make a new updated version of their mod by themselves.
Your only solution is keep an eye on the updates, uninstall outdated mods and install new updated mods every game update and if you want to buy the packs, only add the pack to your game when you install the new updated mod.