You should take a deeper look at the alternative.
Of course the amount at development thrown at Linux has no equivalent in opensource OS, but however improbable as it may seem, Linux is lagging behind Illumos/Solaris on a number for components...
btrfs is about production ready while ZFS is production-ready for almost ten years and improving since. When you see that RedHat EL 7 uses by default XFS, a FS inherited from SGI, instead of EXT4, that should ring a bell..
I definitely would choose SMF over systemd.
I used Linux-vserver and examined OpenVZ, Linux just doesn't offer something comparable to Zones, and certainly not to what the combination of Zones/ZFS/Dtrace/Crossbow offers..
Maybe it is because Illumos/SolariS development is more focused, as these OS tend to be far less ubiquitous from a hardware support, plateform, usage perspective.. Less companies investing development = less conflicting interests/ competition/politics.. On the downside if your requirements doesn't align with the needs of the few companies developping Illumos and you don't want/need to contribute you better look elsewhere..
I kicked the tires of the opensource Smartdatacenter (=Triton minus billing component), it's very well thought, use of resources is very optimized and it offer a unprecedented level of visibility.. Definitely deserves a look If you can do without live migration and shared storage..
I just wish I could deploy it (we use Linux and Windows..) .. maybe later...
Ironically Joyent Triton may be the best plateform to run Linux containers, especially Docker..
According to Simon Eskildsen who wrote a detailed post "Why Docker is Not Yet Succeeding Widely in Production": "from what I've seen most issuess we faced (except image building) are solved on Triton/SmartOS"
Ubuntu have enough consideration for these technologies to they partner with Joyent to offer certified and supported Ubuntu images on Illumos containers.