I don't really see as most of these features being particularly new or different, there are loads of SDKs and packages around for rendering emails and sending t

I don't really see as most of these features being particularly new or different, there are loads of SDKs and packages around for rendering emails and sending them with various providers. It's really a non-issue. Deliverability is the #1 problem all developers actually face with this imo. We have perpetual issues with extremely high importance, but extremely low volume transactional email from admin panels alerting various (usually non technical) people to things. For example; an important extremely high value custom order has been requested and requires senior signoff in a platform. As far as I can tell nothing really suits this, it's too low volume (<1k emails a month - maybe even a few emails a month) for it to work well with dedicated IPs and shared IPs constantly get spam blocked on the major MSPs. In the the end we tend to use SMS or slack/teams webhooks for this.