DIfferences between 限定 and 制限


I was trying to understand the differences between `限定` and `制限`, but I don't
really get it: I found that [the former](https://hinative.com/en-
US/questions/906361) is generally a business term seen as positive and
special, yet as example sentences I found `切符の数は限定されていた` (which isn't really
positive) and `今話し合っている問題だけに発言を限定してく下さい`, which isn't necessarily business
related.

[Here](https://hinative.com/en-US/questions/1125622) they say `制限` is an
upper/lower limit, while `限定` is to assign some amount, which I'm not sure is
right/complete since again I found examples seemingly going against this, like
`この版は７、０００部に限定されている` and `彼は会員数を２０に制限した`, which kinda seems similar, both
imposing a man-made limit to something.

In [this question](https://japanese.stackexchange.com/questions/12447/whats-
the-difference-
between-%E9%99%90%E7%95%8C-%E9%99%90%E3%82%8A-%E5%88%B6%E9%99%90-and-%E9%99%90%E5%BA%A6)
there is some explanation, but it doesn't cover `限定`.




I think these are good examples to understand the difference between them
easily.

このパーティーの参加者は、30歳に限定されている. It means "Only 30-year-old people can join this
party".

このパーティーの参加者は、30歳に制限されている is unnatural because we can't know whether it means
an upper limit or a lower limit. It must be "このパーティーの参加者は、30歳以上(以下)に制限されている.
限定 can be also used in this sentence as the same meaning.




I think these are good examples to understand the difference between them
easily.

このパーティーの参加者は、30歳に限定されている. It means "Only 30-year-old people can join this
party".

このパーティーの参加者は、30歳に制限されている is unnatural because we can't know whether it means
an upper limit or a lower limit. It must be "このパーティーの参加者は、30歳以上(以下)に制限されている.
限定 can be also used in this sentence as the same meaning.

