Seems about a 50/50 split between those who believe Oswald acted alone and those who don't.
A softball teammate of mine who was a schoolteacher and taught about the assassination was convinced Oswald either did not act alone or wasn't even involved, but he wanted to be sure of what he was teaching. So, one summer (30+ years ago) he took the time to visit the site, interview police and witnesses there that day, read the Warren Commission report twice - along with any material he could find contradicting it - and changed his mind, conclusion Oswald acted alone.
One night after a game he discussed his research with us. I don't remember all the details but he had an answer to everything as I recall. I also understand there is further evidence to support JFK was shot from behind as Larry Sturdivant's book outlines along with the link I found.
To close, one problem I have with conspiracy theories in general is they require too many players at too-high an agreement percentage to completely throw all morals out the window (e.g., moon landing "hoax"), not to mention no one comes forward years later when the coast is clear with the irrefutable proof they undoubtedly would have to cash in and become a historical figure.
Link: https://www.sciencedirect.com/science/article/abs/pii/S0379073822000949