Welcome to the daily thread where people speculate about why Windows 10 Mobile isn't officially released yet for their older or budget-class devices.
Suggestion: If you want it so bad, join Insider https://insider.windows.com/ download the Windows Insider app, select Slow or Fast and then check for updates. Don't forget to come back here and complain loudly when the upgrade fails or your favorite feature doesn't work right.
Posted from my Lumia 950XL Dual Sim running Windows 10 Mobile
Surgeon General's Warning: This post contains sarcasm, an ingredient known to cause distress to people with deficient sense of humor.