Hello,

I'm in the midst of reviewing an old CRUD SAAS I have running on Angular 7 with a MariaDB backend and Laravel PHP. Presently is hosted on a couple of Linode servers- and really feeling the weight, especially with the looming need to upgrade to A15 and meet the pace and scalability occurring (for context, the SAAS turns in over 24k USD monthly in subscriptions- so I have concerns around the impact of a new stack on existing clients). Additionally, I manage a Kotlin and Swift codebase for appdev.

I'm looking at moving towards Flutter for a singular codebase, and something serverless but still relational- like Supabase. In the past, I ran my own Auth services- but it was a ton of work to setup and maintain, so looking at using Firebase for Auth services (I know Supabase has Auth as well, but I wonder if it's as reliable and frequently maintained as Firebase?) Supabase has a FlutterSDK as well which makes things much simpler. Planning on maintaining microservices like Stripe etc for functional aspects.

I would love some insight from those who have done a tech stack transition, what should I be aware of- those who have produced in Flutter or a similar stack, what am I walking into without knowing?