I went through the process of migrating to server-side GTM myself, and it definitely came with its challenges. One big concern I had was ensuring that my event tracking remained reliable during the switch. I spent some time on see more recently. I ended up on a setup where I could use a combination of Google Cloud Functions and the server-side GTM container to handle my data processing. This approach not only improved my website's performance by offloading processing, but it also allowed for more accurate tracking with cleaner data. Overall, while there were some bumps along the way, the benefits of real-time data processing and more reliable event tracking made it worthwhile for me.