While a lot of old school 4X games used limited jump points and and fixed transit destinations, many used some form of keyhole drive - a drive was/is required to use the jump point. That's not Starfire as inspiration - it's Niven, Pournelle, & Niven's CoDominion setting (Falkenberg series, Mote series)... and the Alderson points.
The following verses are much closer to CoDoVerse than to Starfire:
- Wing Commander
- Bujold's Vorkosiverse
- Space: Above and Beyond
- Doohan's Flight Commander series
- Stargate universe (SG1/SGA/SGU)
- VSCA's Diaspora RPG
Note that Doohan is almost the midpoint - activate the drive at the point to swim through the tunnel to the next junction...
And Webber intentionally distances himself from Starfire in the Honorverse, going back to a keyhole drive (involving the Minovski Sails, etc)... but reading the novels, it's clear he was thinking in terms of Starfire battles at HT4+...
I strongly believe that the Alderson Drive was SVC's inspiration for the Starfire Warp points, but note that the keyhole effect is integral to the I drives even in Strikefighter... but I also doubt SVC would admit it in public.
Either way, the restricted tramline effect is GREAT for wargaming (see the 1974 design of Imperium, released in 1977, but Marc's put the original hand-drawn maps up at various times)...
And so it's been reinvented/copied dozens of times. There are more settings that use variations on both