[2023] Should I set aside unique items for 1.0 release?

I'm playing for the first time (offline) and started setting aside unique items my character can't use. When 1.0 releases, can my new character use these items? I'm asking because I heard conflicting things: that seasons will be coming with full release, but also that standard will recieve updates as well.

So I'm wondering if I can use these items on new characters without missing out on content when 1.0 arrives. In Path of Exile for example, you cant really do that, because most content is exclusive to the new league.