There are four reasons for me to choose TiDB Serverless:
1. MySQL compatible: no pain to use
2. HTAP: TiDB has a great TP performance and an excellent OP performante. See their OSSIsight project: https://ossinsight.io/
3. Serverless: The separation of storage and computing architecture makes TiDB Serverless cost-effective to the extreme
4. Rich ecosystem: Vercel + TiDB Serverless = A Freedom Porject. See https://vercel.com/integrations/tidb-cloud