Eventually they’ll grow longer, but they will still have a mind of their own.
I colored my hair since turning 30 with a “semi-premanent” color formula that fades over a month or so. I did that because of how drab and ashy my once golden-blonde hair had become. I wasn’t trying to cover the ‘salt’ – it was the ‘pepper’ I didn’t care for. Now as 50 looms on the horizon and I’m about 40% ‘salt’, I’ve stopped coloring, and I do notice that the grey hairs are more unruly than when I was coloring. So even though the coloring formula didn’t really dye the grey, it did somehow improve the texture. They make colorless glossing formulas, but I personally wouldn’t be too keen on using all those chemicals just to smooth a few stray greys.
I don’t use a hairdryer, but I do shampoo and condition every day (or the roots will get greasy), and work a leave-in smoother in the ends (which tend to be dry); if I want my hair to be a little more tamed, I will use a mousse along the front hairline and the part. There are a lot of natural products out there for smoothing and taming coarse hair – which is what makes the greys stand out. You don’t have to spend a fortune, because if you only use a small amount in the visible areas as I do, it lasts a long time.