Coolant flow

how old is the info in these books yall posting? post pic of copyright dates in the front of them books!! yall ever think technology advances, or stands still threw out time??? theres cheap stock replacements stats, high priced stock replacements and then theres better than stock, think there all made the same??? not a fan of t-stats my self just something to malfunction and cost ya a head or hole engine! takes just a few minutes more to warm up but never any doubt my coolant flowing!!