Opinions on low milk supply

For the first 6 weeks after my son was born I had an amazing milk supply, I pretty much exclusively pumped. Long story short, at six weeks old my son was very sick and hospitalized for almost a month and he was unable to eat, so my supply had dropped drastically. (Praise God, my son is 100% healed and healthy) I have tried fennel oil, fenugreek, mothers milk tea, pumping extra, etc. my supply never went back up. I am supplementing with formula, thank goodness there are other options for feeding my baby. My son is now 6 months old. My question is, is a little breast milk better than none? When should I stop pumping and just give formula since my supply is so low. If any of you have opinions from experience I would love to hear from you. Thank you in advance!