The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Happened as dated, per macrumors.com: "…Develop Modular Mac Pro, Which May Not Ship Until 2019 Apple[3] executives this week made an unusual a…"
CNBC's own headline states the Mac Pro 'will be available to order Dec. 10' [2019], landing right at the pin's stored December 31, 2019/January 1, 2020 date.
Apple's June 2019 press release gives the Mac Pro's "Xeon processors up to 28 cores", 1.5TB memory, eight PCIe slots, MPX Modules, Afterburner card and stainless-steel space frame.
AppleInsider quotes Apple's[3] Tom Boger stating in April 2018 that 'the Mac Pro is a 2019 product. It's not something for this year,' anticipating by about 20 months the pin's stored date, which matches when the modular Mac Pro actually shipped.
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.