I get blight every summer, but, because of my policy of promptly cutting off all the top growth (I use sharp shears), I rarely lose any actual spuds to blight. I grow tomatoes in a biggish greenhouse (I grew them outdoors in Essex but it doesn't work here), and, despite what all the pundits tell us about greenhouse toms being safe, I get the blight in there as well, every year. Tomatoes are just that bit smarter at fighting off the disease so it's still a worthwhile pursuit. My favourite tomatoes are Sungold, little orange cherry toms. The plants have the added advantage of being resistant to all the soil-borne tomato wilt diseases as well as leaf mould, so I grow them in the greenhouse soil (hugely enriched with my garden compost every spring) year after year, no problem.