Grav vehicles are expensive. Even with the (quite excessive, in comparison to Striker) LBB4 proce corrections reduce the Air/Raft from Cr600,000 to Cr60,000; my Striker-designed low performance Grav Car costs Cr30,294. In comparison, a Ground Car costs Cr4,000 in LBB3 and 400 with LBB4 corrections; a cheap Striker sedan design costs Cr3,472. LBB3 lists the cost of living in a reasonable quality for a month (lodging and food) as Cr300; LBB2 lists the salary of a Gunner as Cr1,000 per month and that of a Pilot as Cr5,000 per month; LBB4 mercenary salaries (not including shares) move between Cr300 and Cr2,000; LBB1 lists retirement pay as moving between Cr4,000 and Cr10,000, depending on the number of terms served.
All of this leads me to believe that a large portion of the population on TL8+ worlds (where Grav is available) either have to save money for a very long time to but a Grav Car (as is IRL for an expensive ground car), or have to ride the Monorail or the 'Tube. Only the upper middle class (ship crews and military officers) and abouve (corp execs) will have easy access to personal Gravitics.
All of this leads me to believe that a large portion of the population on TL8+ worlds (where Grav is available) either have to save money for a very long time to but a Grav Car (as is IRL for an expensive ground car), or have to ride the Monorail or the 'Tube. Only the upper middle class (ship crews and military officers) and abouve (corp execs) will have easy access to personal Gravitics.