Consumer Reports magazine recommends against extended warrantees.
There have been some significant changes over the past few years with parts longevity, parts costs, labor, and shipping rates. For most of my large, long term purchases now, I consider a manufacture (not 3rd party) warranty extension.
The golden years of owning a Toyota long term or perhaps most other well known brands and only doing regular Maintenace may be over. Still Toyota is overall better than other brands but they do have their issues and design flaws.
One coolant sensor, head unit, rear liftgate, or something else and I am near break even point, give or take. Two repairs and I am ahead.
I do not have a place to do my own major work or specialized tools, if I did I may have forgone the warranty.
With most nicely equipped Toyota's costing $35-50K now, $1800 insurance over 7 years/89K miles (after 3/36 is over) is not a bad deal to me. Also, the Platinum warranty fills in the gaps of the 6/60 powertrain warranty and has some car rental provisions & roadside assistance. It also is transferable if one decides to sell, which would be a great selling point for a private sale.
I have owned 3 Toyotas over the past 30 years and never purchased an extended warranty but these were on base cars costing between $10-20K.
After getting burned with the 2.4 liter oil burner in a mid 2000s Toyota, and reading about the issues with the Gen 5 here, coupled with the overall cheapness/light weigh of today's parts/designs, I opted for the extended warranty. We will see if it was worth it over the remaining five years or 83K miles of the warranty for me. JMO