I think BullMQ with deployment in kubernetes gets people off the ground quite quickly and scale out quite well without needing to worry about fine tuning the solution. Also RabbitMQ has also worked pretty well for us handling around 150k RPM messages with delayed exchange enabled while running in kubernetes without any tweaks. As a dev working on solution that is used in the industry of customer support, I am more worried about,

1. Data locality

2. Privacy

3. SLAs and Uptimes

While SaaS solutions like these can get us MVP/PoCs fast but a home grown solution is more preferable when SLOs are tight and security is a huge concern.

[edit: formatting]