If it really makes you feel better I can even show you my monthly payments from that time :P (though since you felt the need to make an alt account it doesn't bother me on if you believe I played or not) But yes, I did play Vanilla, in fact I played it way more than I should've as at the time I was in college, not working and put way more time into the game than one should've really. So I was constantly in BG's, the 10-15 man dungeons and doing raids during the evening time with my guild.
By the comment I was referring to after the initial running of the dungeon and going of being amazed how hit looks it'll hit that dull point. Having + system doesn't making it nonboring. It just makes it harder and more loot but you still have the same dungeon and it's not going to change it. If it magically changed the entire mobset each time then it'd make it more interesting, but it won't. People won't be running Mythic+ because it isn't boring, they'll be running it for the shinies and I'll bet anything after a month people will be bored of it, but still run it for the gear.
Get personal? I haven't gotten personal at all. You make it sound like I'm attacking people left and right which isn't the case and nope, the topic hasn't hit a nerve at all. Unfortunately for some, I don't let posts get to that point with me :P
As I mentioned earlier when someone made that same comment. It sounds nice for some end users, but for a lot it wasn't. Especially those that had to micromanage 10-40 people to make sure they had their stuff in order so they could raid and if not find replacements, etc. Whether you wanted to move your rear and do it affected a lot of people if you were going to commit to a guild for activities.