When's the last time you flushed brake fluid?
I do it every 3 years.
it is probably a good idea to change at some point since brake fluid can collect moisture, etc. but that's something I haven't been doing to any car because I'm afraid it gets too complex and time consuming with bleeding ...
I sometimes drain and fill the reservoir (every 10 years) but I don't know if it will impact the fluid down the lines or near the piston. I've read some posts that it will eventually (like in years) refresh or mix with the entire fluid even down the line but not sure.
When I work on the brakes and have to bleed some fresh fluid is added but other than nothing on regular basis.
What's your opinion about the reservoir drain & fill?