I have a lecture section in my AD/DP class about the use of technology. The primary tech that I advocate for isn't new computers, or scooters or heated vests, but using the internet for information. Real information, not necessarily youtube, Facebook or even Scubaboard. In-person forums like TekDiveUSA are phenomenal resources if you can go, DAN has a whole educational library and the Rubicon Foundation has tons of peer reviewed scientific journals, as does Google Scholar.
I mention this because at the technical diving level, you can no longer depend on the certification agencies to keep up with current practices. They just don't have the time to update their materials as often as is needed. A working pO2 of 1.4 is a prime example of that. The generally accepted trend is using lower pO2 across the board, particularly if you are doing any kind of work. When I started diving 2.0 was the accepted limit. Then it was 1.6. Now it is 1.4 for the bottom and 1.6 for deco. Common practice with CCRs is 1.3 to 1.2 for working and up to 1.6 for deco, but possibly less if you are on a long dive or doing multiple days of high PO2 diving. Some deep divers are using 1.0 for their bottom mix. Sure it'll take longer to get out of the water, but it's better than toxing or going blind.
-Chris