Hi,
Contemporary pyrex reformulation was removing lead from the glass, which was mandated by the government. It is no more prone to breakage than it was before.
I did break a heavy corning pot on Christmas day. I forgot I had it in the oven when I lifted it off the stove. My hand was burning and I dropped it hard on the metal grate. Handle snapped off and the bottom cracked. I scrapped out the gravy and threw the pot away. I used this pot for at least 10 years and likely more.
Corning cookware, new or old, are kitchen workhorses. I wouldn't avoid them. You do have to take into consideration they are glass and avoid thermal shock: when I remove them from the oven, I put them on a trivet with a towel on top.
Regards,