We often go all the way when designing the font and include every glyph on the unicode list. I know I have. However, there are many that are completely obsolete and do not need to be included, even for past-proofing. Please everyone from their own corner of the world post such glyphs here, so we can save ourselves precious time.
My 2 cents:
You do NOT need to include historical Cyrillic glyphs from old orthographies before WW2.https://ru.wikipedia.org/wiki/Юс_большойhttps://ru.wikipedia.org/wiki/Ять
are not used anywhere.