Is 50 hours/week manageable long-term?
This depends on you, I personally could do it for the first 1-3 years, but I’d probably want something chiller afterward. You’re basically working 9-7 pm every weekday, so if you sleep 8 hours, then you have only 6 hours of the day to yourself. Not too bad for the first years or so.
How is the SWE culture at OMC?
Unsure, probably worse than roblox
How do the name brands of Roblox/OMC compare?
If you want to stay in quant, definitely go to OMC. If you want to stay/go to tech, maybe roblox is better.