I'm really happy that never dropped or scratched any of my lenses. And the most important the glass. During this time I'm not even using them a lot. Only m50 and the pancake lens. But, I'm trying to be very careful with my equipment, especially lenses, taking in consideration how much they cost and i bought them brand new.
You know, (almost) all of my lenses were bought new as well but in 15 years of shooting DSLRs I have never really scratched or dinged a lens' optics or aperture. Some of my current lenses (like the DA*50-135mm/f2.8) have been with me for over 10 years doing their thing. But, in the end, I did buy cameras and lenses to use them outside - most of my stuff is weather-resistant Pentax gear so I can go on shooting in rain, sleet or snow. I treat my photo gear like I treat my car: as a tools, not holy implements to be worshipped and protected at all cost.
First of all, everything what you wrote above, I would definitely say that should go in resources page, to let newbies and other photographers know, that photography is all about image not what lens, camera brand is used or owned.
I donāt trust or believe in magazines, there is nothing new to learn from there nowadays, everything you need you can find for free on YouTube, google and photography forums.
I also donāt sell my used equipment as Iāve learnt the lesson, you sell it, and you realise after that you need that piece of kit back. And it does go for pennies on eBay. So any equipment which I bought , I definitely wonāt sell it.
When I do shopping, I never buy from unsecured or second hand website like eBay, always the brand website, trusted shops or amazon at the end.
Taking in consideration with new RF line released by Canon, I definitely wonāt afford switching to it. cost a fortune, so Iāll stick with EF lenses at the moment, still does provide great image quality and stability.