As far as I know, currently there are no "good" real time operating systems available. There are some ancient, crufty ones... and some modern soft-real-time operating systems, but that's it. This would be a fun exercise for someone wanting to write something uniquely useful in Rust, for example.
It might make sense to write a pure web browser engine designed for embedded contexts. Think infotainment systems where the web content being served is fully controlled. This would be an opportunity to write something like a HTML5-only engine with UTF8 only, TLS 1.3 only, HTTP 3 only, etc...
Relational database engines need a massive rethink. All of the current popular ones are 20+ years old, and based on 50+ year old architectures. Why do schema operations take time? Why does index rebuilds lock tables? Why are there column size limits? Why is SQL injection still a thing? Why, why, why... because legacy, that's why. Because hard-coding, that's why. Because 1980s C-style programming with fixed-size buffers, that's why. All of this could be just washed away with a rewrite using Rust, Modern C++, and some fresh ideas.
As far as I know, currently there are no "good" real time operating systems available. There are some ancient, crufty ones... and some modern soft-real-time operating systems, but that's it. This would be a fun exercise for someone wanting to write something uniquely useful in Rust, for example.
It might make sense to write a pure web browser engine designed for embedded contexts. Think infotainment systems where the web content being served is fully controlled. This would be an opportunity to write something like a HTML5-only engine with UTF8 only, TLS 1.3 only, HTTP 3 only, etc...
Relational database engines need a massive rethink. All of the current popular ones are 20+ years old, and based on 50+ year old architectures. Why do schema operations take time? Why does index rebuilds lock tables? Why are there column size limits? Why is SQL injection still a thing? Why, why, why... because legacy, that's why. Because hard-coding, that's why. Because 1980s C-style programming with fixed-size buffers, that's why. All of this could be just washed away with a rewrite using Rust, Modern C++, and some fresh ideas.