So, I am not going to click a link on bimmerpost, as I am fairly sure I know what the general gist of the conversation would be (coming from almost 2 decades of BMW ownership and at least a decade of participation in BMW subforums prior to getting my Model 3.
To attempt to answer the question asked in the first post, in a general manner, my opinion is its a combination of:
1. Typical BMW Model 5 and 7 owners / buyers are looking for a more luxurious feel than Tesla vehicles provide. Teslas in general are more sparse inside, and do not have the same fit / finish of your typical BMW.
2. Many vehicle forums poo poo teslas in general as they are the standard bearer for EVs, and they dont like the idea of EVs in general through either ignorance or resistance to change.
3. The leader / CEO of Tesla is VERY "polarizing" (I am not going into it more than that, and I suggest no one else go into that more than that either, or its likely the thread devolves and @bmah
would have to take some further actions)
Especially when new accounts come on a Tesla forum and ask this type of question, many times it feels like simply fishing for comments, or "trying to get conversation going" on a topic that has been discussed, and discussed, and re discussed, and re discussed, and discussed some more, so its hard to take threads like this seriously when its been discussed in some form or fashion for years.