I always thought it was largely irrelevant to the most pressing issues politically, there is so much sprawl in the Trump presidency, a lot is just noise. Like the House and Senate investigations, at times we followed them breathlessly, but they were largely unimportant too. Maybe the end result, that Republicans are just straight compromised, and won't admit, but the actual investigations meant very little.
The main points for me are
Southern District of NY investigation (Cohen case)
SC investigation
The 2018 and 2020 elections.