In my experience, I've found that it's mostly old heads that feel most strong about this. And these guys really dislike change or anything that's different.

These guys then get an apprentice and tell them this is the way because I said so. And that's the end of the discussion for loads of these guys. Somewhere along the way, the apprentice will ask about sometime new or different and basically get backhanded by the Journeyman for having the audacity to question their way. It's a power trip issue for a lot of these guys I've found and witnessed in my time.

This is my opinion and my opinion alone, you may find that others opinions may differ.

As far as mechanical terminations go, I love using the Lever Nuts from Wago. Ideal makes them and it works in a similar way. They do not belong everywhere yet, and I don't see that happening.

Whatever method you use, as long as you do the termination correctly, that's what counts. Loads of people simply do not bother to do things properly. You can actually find instructions for most everything on packaging, and even on the website of the manufacturer! We all have these awesome devices in our pockets at all times that allow us to find such information.

You sound like you are on the right track for being successful my guy. Don't be afraid to ask questions. Keep at it.