Ah fair, but for someone thinking “I’ll give Blackadder a try, it gets recommended to me a lot…” it’d probably be quite a bad introduction that would likely put someone off rather than encourage them to watch the rest
In every instance where I know of people who watched 1 first, they are almost always put off by the silliness and don't continue.
I think BA2 will always be my absolute favourite of all as it was the first one I watched, and it also endeared me to the delightful characters that Miranda Richardson, Stephen Fry and Tony Robinson brought to the show. Only Hugh Lawrie in BA3 came close.