The board game with missing pieces and a replacement penny still works fine. So do a lot of imperfect things.

A thing can be incomplete and still do its whole job. The missing piece bothers you more as an idea than in practice, because the point was never a perfect set; it was the people around the table. Plenty of good arrangements run on substitutions nobody minds once play starts. Waiting for the complete version is usually just waiting.

Think of one thing you have been putting off until you have the proper kit, the right shoes, the full set. Start it this week with the penny version. See whether anybody, yourself included, actually notices what is missing.