@Quaternium, this question has been asked by many /e/ users. Only the creators of /e/ know the answers. More background knowledge is provided by /e/OS and the Art of Remote Project Management.
The makers behind LOS 16.0 or LOS 17.1 are doing a great job. They should also be supported with donations on a regular basis. However, LineageOS and /e/ are quite different from each other.
/e/ isn’t just a custom ROM, /e/ is more. The /e/ philosophy will be a /e/volution and a /e/cosystem including e.cloud and e.email. Read also /e/ manifesto …
Whether LOS is better than the /e/cosystem for you, ultimately only you can decide.