I have a near launch (2007 with BootMii as boot2)
It still plays Project M fine (from disc and USB).
What I recommend for you:
Hardware Side:
- Keep either vertical or horizontal on it's rubber feet
- Keep air well circulated, especially when on or in standby
- Keep a good Hard Drive (Flash Drive works, just make sure it is good quality like mine) plugged in for playing games (I use a 16GB Micro Center USB 2.0 Flash Drive and haven't had issues)
- Keep a good quality SD card (I use a 16GB PNY card, works great, unless partition table gets fucked up, which happens when it is removed during reads or writes)
- Keep all equipment accessible at all times (I stored away my sensor bar and Wii Remote stuff, and leave a GC Controller and memory card in for all usage of the system)
- Clean out any dust from the outside (and/or inside) of the Wii
Software Side:
- BootMii as Boot2 (If possible), Priiloader, and BootMii as IOS. 3 layers of protection are brilliant.
- USBLoaderGX autoboot via Priiloader due to the fact that it has a Wii Menu mode, and it is navigable with GC controller and since it can blend your Wii NAND games with your USB games (When BootMii is installed, rename the bootmii folder to bootmii-not or something similar so Priiloader gets priority)
- WiiConect24 disabled to disable standby and prevent overheating. It is pointless to leave enabled since it got discontinued back in 2013.
- I would only have 1 or 2 cIOS to prevent issues.
- Configure Priiloader to redirect Wii Menu to USBLoaderGX when you select it from home menu
- Keep NAND backups in a safe place (with their keys as well)
Overall:
- Do not brick (hard or soft) to have your Wii live a long and healthy life!