Engineering Explained[0] on Youtube does a good job talking about improvements across both technologies.

He says he gets this question a lot when he talks about conventional engine improvements, whether or not they are going to be irrelevant soon. In one video (which I frustratingly I can't find at the moment) he lists a series of use cases that are going to rely on conventional, maybe diesel, for a long time, especially heavy hauls across remote areas.

https://www.youtube.com/channel/UClqhvGmHcvWL9w3R48t9QXQ

EDIT: This is probably the video: https://www.youtube.com/watch?v=Hatav_Rdnno&t=27s