@wchnu - 30 years of the same razor, with every cheap blade I could get, stretched as far as I could manage.   With care, I can stretch crappy blades to two weeks.  I _still_ can tell the difference between an Astra SP, a Voskhod, a Dorco, a Derby, and so forth.    Now, that's ONLY DE's.    When I pick up one of the GEMs and put the blade in it, you can be sure I'll be spending time watching a few of your (and others) videos before putting it to my face.   _zero_ skill.     I vaguely remember the early days of using it and learning.   30 day focus?   Didn't have a choice 
What I'm saying is that if you want to be patronizing, think about it first, please?    We're not talking about a fantasy world, we are discussing items which are manufactured in different places to different standards, with equipment of varying tolerances.  We're also talking about people who have different types of hair and different types of skin.   Dorco is NOT Derby, which is NOT Nacet, which is NOT Shark.    If they were all close enough to be like the 'It's all in the technique!!!' people say, then there's only be _one brand_ per country, and one blade type per brand.  Nobody would bother selling another, let alone ship them across international borders.  
Mind you, I think that the technique people are correct enough that it's the main reason why we now only HAVE four or five manufacturers, world wide.   They still found it profitable enough to have uncoated, coated stainless, chrome plated, and carbon blades for sale.   
Do I come across as arrogant?  Probably.   It's mostly because unlike a lot of people on the various shaving forums, I started with the DE at age 14, and stayed with it after trying the other options off and over the years.   It wasn't a decision made a short time ago to try to make the shaves more fun, or avoid razor bumps, or explore the new options of fad hand-machined razors, or anything like that.   It was a decision based on the fact that even with the REALLY crappy blades available to me, I still got better shaves for less money than using cartridges, and the razor tolerated anything I used for shaving cream/soap.    (Wanna learn technique?  Use Dial or Safeguard instead of ARKO... the burn!)    I will freely admit that I am an absolute newbie for anything _other_ than DE's.   No skills, little knowledge, and no time to really learn good skills.   Straight razors are a bit scary.   Shavettes just look like an accident waiting to happen - but I'll eventually give them a shot.  I may decide that they're not for me (straights, SE, or shavettes), but I'll try them for a while first.
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