Well, we haven’t sent a crewed mission to the moon in a while, because we don’t really have any particular benefit from it, and even if that had continued, that wouldn’t have fit with the scifi vision of how things should be. A Mars trip is theoretically possible, but that’s a multi-year mission for a single trip. That’s a lot for what would mostly a vanity project of a manned mission compared to sending probes.

On the concept of a Venusian research station, the question would be… why? Staff would be in practical terms in no better position to study Venus than they would from Earth. All they could do would be supervise instruments in ways that could be done remotely.

The point is while advancements are possible, none that would even tickle the more tame sci-fi visions of expansion within the solar system. The larger impediments to a Mars mission are just “why” not technical impediments, unless a technical improvement could cut that trip down by 10-fold, but nothing even vaguely hints at that being a possibility.