200,000 Mile Club

I just crossed 300k km on my 2012 Prius which is close to 200k miles. I got it used with 160k km on odometer.

1) Did you replace the HV battery pack? - No. Do you maintain it? - Cleaned the battery cooling fan (was not dirty) at 240k and installed homemade air intake filter.
2) Did you replace the 12v battery? - Yes, at 250k, but as a preventive maintenance, old battery still tested as good.
3) Did you replace the transaxle fluid? How often? -- Yes at ~240k only once, but will do more often going forward.
4) Did you replace the brake pads? - Yes. Rear sliding pins got stuck due to winter road salt and caused excessive pads wear. Serviced with some new sliding pins, and new pads and rotors in the rear and front.
5) Your lifetime MPG (if available)? - Not known. Currently at 4.3-4.5l/100km or 52.3 to 54.7 mpg depending on driving mood.
6) How often do you change your oil? - Every 5000km or less. Does your Prius consume oil? - No, or maybe a little as I cannot really notice between the oil changes. What brand / product did you use? - Used to use Mobil 1, then just Mobil, full synthetic.
7) How about posting a picture of 200,000 miles on ODO? - Yes, here:
8) Did you install an oil catch can? How often do you inspect or dump it? - Yes, after EGR circuit cleaning at 240k km. Approx after each 1000km and more often during winter. I have installed a drain valve to avoid opening it as it is located under the engine. Do not inspect it, only drain.
9) Have you cleaned the egr circuit? How frequently? - Yes, just once, but will do it again if I see a carbon buildup in the air intake.
10) Any other maintenance? - Rust protection undercoating every year for the last three years. Replaced part of surface corroded, but still working braking lines in the rear. Changed engine coolant pump and thermostat as a preventive maintenance, rear wheel hubs (NSK brand) after the left rear speed sensor failed and then both front wheel hubs as a preventive maintenance at 290k km. Plan on replacing rear trailing arm bushings and front control arms, sway bar bushings and ties next summer as a preventive maintenance, but currently no issues/noises with old ones yet, just for peace of mind.