Another "Pro" (meaning someone who has his maxed hirez (1680 antiglare!) Mid 2010 15 with 8Gb+512SSD as the main work tool, and that has worked flawlessly for the last 6+ years and that stays on probably for 14 hours a day, on average) chiming in.
Sometimes, dozens of tabs open spread through 20+ browser windows to support my research, added by Word, Excel and Powerpoint open + Windows 10 in Parallels, proprietary aviation software, backup tasks running in the backround to a Mac mini server (also mid 2010), connected to a Dell 27", printing high volume to a business printer, playing Apple Music in iTunes, all at the same time. All the while, reading, analysing, writing prepping presentations and training sessions. Ah, and to distract myself a bit, Netflix occasionally comes in (damn Silverlight that makes the fan heard!). And it does do Handoff ;-))) [that I consider to be a gimmick for my usage model, but it's fun]
Then, on the move, 200+ days a year on the road (actually in the sky, I'm an aviation consultant, trainer, auditor), always with the Mac along, working in the air, at clients and in hotel rooms. Connecting to all sorts of wireless and wired things (dongles galore already, yes!: mDP to VGA, DVI and HDMI!) in between, international adapters for the PSU, and.... a new 15 maxed on order (lying, just 1TB) for 4100€ + 80€ of a selection of adapters already bought, to replace my mDP adapters. Fully expecting to get another 6 years out of it, while my 12 year old son is already drooling over my 2010, which from my own empirical testing can still outperform any brand new Windows laptop PC under 1000€ and certainly outlast it.
As to price, yes, I would love to get it for free, but it's pointless, I won't: workhorses are not for free.