sudo disable trimforce doesn't work

Since upgrading to High Sierra my boot time slowed down considerably (from ~10 seconds to 90 seconds). Googling this problem suggests disabling Trim might work as a solution, which you do via the sudo trimforce disable command, but it doesn't actually seem to disable Trim. After running sudo trimforce disable and pressing y twice, my Mac automatically reboots but after rebooting, system_profiler SPSerialATADataType | grep 'TRIM' or System Information->SATA/SATA Express still shows TRIM Support: Yes I also tried to disable System Integrity Protection before disabling Trim, and that doesn't seem to work either. Anyone got any ideas?