What pitfalls would I use software RAID 1 in Linux?

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Read this manual and any doubts about software RAID 1? as the author describes "sudden" problems out of the blue. Those who have experience of such use?
In the near future intends to make the file archive based on Ubuntu 16.04 (this version, don't ask why) and you need to decide: hardware or software RAID 1? Please tell us about your experience.

p.s. please refrain from questions and comments that do not carry meaning on the topic.
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for several years now on a home server is a mirrored software raid first on 16.04, no problems unnoticed during use.
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Years working servers (a few dozen) with software RAID, almost all types of RAID 1, 5, 6, 10 do not have any problems.
Watch out for SMART HDD, do backups and sleep well.

If you decide to take a hardware RAID - do not take fake raid looking directly on the full solutions from Adaptec, 3ware, LSI
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I am not a professional administrator and my EXPERIENCE should not be relevant. But if you are asking, then...

When rented dedicated servers in the same Hetzner - there is almost always software RAID was part of the server configuration, if needed mirroring.
For several years problems with the RAID occurs only if the disks on the server was the problem. And when that happened, this RAID 1 saved from data loss.
On your home server - the same. Once the RAID 1 I have collapsed, but it happened because I configured it for incremental the names of the block devices (like /dev/sdd), not a UUID identifiers, which depend on to which connector the drive to connect, etc. In the end, my RAID on the home server was disorganized (working half) half a year and when I noticed it - it was a couple of hours easily synchronized back to normal.
The last example, incidentally, should be a good hint that any RAID without monitoring is not reliable enough.

Here, you'll likely unsubscribe that with software RAID there is no problem. If you want to avoid systematic error survivors - look for problems themselves. Preferably in English in Google. Just don't panic and rationally try to evaluate how likely it is that you something will happen.
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mdadm and other fakeraid's - budget solution, better hardware no doubt, even if no BBU

from experience
house mbr mdadm update rough was normal
at work mdadm with gpt at upgrading the system rude not preinstalls-error I do not remember. I spat and put on 3ware 9650SE-2LP RAID 1
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Alexander Black, What is hardware RAID? This is a problem with full identity disks (you will after 5 years running and look to replace such a disk array, and it have long been removed). This and the problem of soft (wood, soft under Linux)
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