I've been wondering about this too. I remember having to plot every single jump before there was even a route planner, and there was a kind of special skill to it. Sure, it was tedious and error prone but it felt like exploring. I was happy when the 100LY route plotter came out, but the 1000LY route plotter seemed cheap to me at first. Then I got used to it and started measuring trips in plots of 1000LY. When each route was finished, I'd spend a bit of time in the local systems looking around and then take some time to choose my next 1000LY plot, taking in any sights or places of interest along the way as part of that choice. It became part of the exploration cycle.
I'm currently on a slow trip to the Styx region and was about 12000LYs away when the update hit. I tried to plot a course all the way to my destination and, sure enough, the route came through complete with neutron streaks. That felt
really cheap. However, after a couple of evenings following this route, I realised I wasn't actually exploring anymore. I was just travelling. So I cut my route, made a shorter one without neutron stars and started following that. Now all is well with the world. Especially the Earth-like one I found in the second system
I think straha20 has basically nailed it - plot long, fast and direct when you want to cover space, plot short, slow and meandering when you want to explore. Where once we'd lock in our 1000LY routes (or I did anyway), now we can be more flexible and change it up in different ways.
From a "lore" perspective, I like how the range of the route planner has grown as explorers have pushed further out. It feels like the technology is catching up with the pioneers. There was a time when the 1200ishLY trip to Barnard's Loop was an epic undertaking, but now Beagle Point is a regular destination and there's practically a gift shop at SagA*, so it feels right that the route planning has extended over time.
I'm not even sure if distance is such a priority for exploration now, not now there are so few distance records left to set. It seems that a lot of the recent expeditions are more about mapping regions (my one man expedition certainly is), at which point the ability to plot longer routes becomes more of a quality of life thing than a cheap shortcut. On the other hand... it does take some of the satisfaction we all used to get when we found a route through the gaps and the rifts.
But that's progress for you. There's no nostalgia without it.