Got a 203 brake adapter and rotor last month for the rear, because the 180 adapter (+20 shimano PM) seemingly folded a little after I uninstalled it and I was confused as to why the bolt holes didn't line up and nothing sat flush. I removed it since I wanted to reclean and lube the pistons, since one was sticking further than the other, and thought I could get a better angle on it this way.
A month prior, I had replaced the brake pads.
A month prior to that, I had to replace the rear derailleur and chain, since an outer link popped off the prior chain and wrecked RD as I pedaled.
4 months prior to that, I had replaced the rear tire with a DH casing Assegai.
Memory is hazy before this, but I know I went through 2-3 tires for the rear, smashed rims on the front OE and newish carbon rear wheel (Fall '19), worn-out rear brake pads, OE rear wheel that I wrecked a freehub on (Summer '19), and a DHRII tire I had in front (April '19), all in the 12 months prior to mounting the Assegai. I have photo and maintenance records to back my memory up.
I didn't necessarily *buy* these things at this time. I bought them a long while ago, as spares (or steal parts from my other bikes). The things I do rack up a credit card bill on are mostly gear, like a GoPro Hero 8 Black, 100% Armega Goggles, extra sets of balaclavas to comply with COVID-19 mask guidelines, shoe gaiter, Leatt AirFlex Stealth body armor, and 4 fresh merino shirts.
Seemingly only the frame, Shimano motor, battery, wheel speed sensor, brakes, and suspension are stock on my ebike. The fork's bushings are clacky like a loose headset. Rear tire is almost bald. Been wanting to get another battery, as mine has reduced capacity (8300 miles on the odometer, lasts under 3h on eco) and I want to increase my roaming range. I often start planning to turn back when I see I'm at 2-3 bars, knowing I'm relying on the battery to help me carry the spares, gear, and heavier-duty parts this far in the first place. There's performance left on the table, and I feel like I'm getting value out of my purchases enough to move up to better... been eyeing that Marin Alpine Trail E2.