[GoldenXtreme]

I've only seen a handful of older Ultra shows, but I get the impression the Ultra series leans into cross-show continuity far more than Rider or Sentai tends to. Are there any shows that people suggest watching only after seeing specific older entries first? I'd like to try something more modern at some point but I'm nervous I'll pick something and it will be like "you fool, you didn't watch Orb first and the plot is ruined now" or something like that. Maybe I'm afraid of nothing, you tell me!