I hadn't stopped to look at my work kit for quite some while. I simply use it when required, semi-clean it, and add it to the pile until the next job.
Just yesterday I was working on a small job, and suddenly realised that ALL my brushes were no more than worn-out rubbish. Frankly I was somewhat embarrassed by my own lack of 'care'.
'Professional' painters are far more slap-dash than their 'Amateur' cousins. Whereas the Amateur will buy sets of colours, sets of brushes, nice wooden palettes, and ready made canvasses, the Pro' will often make do with whatever is handy at the time; I once had a friend who used toothpaste instead of white paint; what his work looked like after a few years, I can't imagine. Winsor and Newton's clientele, are far more likely to be members of an Art Club, than to have graduated from the RCA.
Looking at my kit, above, I've realised that a visit to my nearest supplier is definitely on the cards. If someone was to ask to borrow a brush, I'd have to refuse.... they are disgusting.
I once visited Francis Bacon's mews studio in South Ken; it was way far filthier than mine, his piles of brushes were left uncleaned, and there were tubes of paint all over the floor. I'm not yet that bad.