my suggestion is to add the techage mod in a way that does not force the user to use it but provides an additional pathway for players to go should they want to
some QOL improvements to carts should includer vertical / horizontal rails and banked rails (for rollercoasters ) and carts should have a max speed of 20 ingame but theyr velocity should be uncapped meaning that although the cart only travels up to 20 nodes a second placing 20 boost rails at the start of the track should allow the cart to travel 200 nodes (assuming each powered rail adds + 10 velocity ) 180 of which should be traveled at 20 meters a second this would enable launched rollercoasters that only have powered rails at the front of the course (also if techage is unlocked maybe allow carts to go up to power provided / 10 meters a second of aditional speed (to theyr max speed )
2 nd if a new node that would be called something like techage cart accelerator is used for coasters that need more speed
3 the space_travel mod if added should get a techage : oxygen bubble creator multiblock and maybe techage could also have advanced space suits with jetpacks and maybe training gear like space station mockups to get skill points to be able to walk faster on other planets for example