You shouldn't be installing via product manager.
You should be downloading everything manually from the website, then unzipping them into the same root folder, which allows you to install everything in one go instead of having to run 100 different installers.
And then you can back up that entire directory structure in case you have to reinstall later.
After installation, the content folder can be copied to other machines - macOS or Windows - without issue. You just install the applications on the other machines and set the content location, and its installed.
Maybe
should is too harsh a term... "
Are behooved to..." may be more apt.
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You aren't getting any real-world benefit from those 96K samples - certainly not any that is worth wasting 250GB of SSD storage on. And like I said, it ramps up both the load times and RAM utilization of the libraries.
The size of these libraries is being used as a marketing bullet point for people who think more is better, when in this case more is just more wasted space. 600GB of samples... SO MANY GBS!!!
This is just the result of a "bigger just has to be better" thinking. Symphony Essentials fits in 20GB of Storage and Iconica Sketch is a 5GB Library. Both of those sound better than Philharmonik 2... and UVI Vintage Vault sounds as good as Syntronik 2 without ramping up the sample rate to 96K (they deliver 44.1KHz samples).
Most high-end orchestral libraries deliver 24-Bit 48KHz samples, so that argument is pretty weak in the grand scheme of things - from a practical standpoint.
If 96K were such a killer feature, then libraries designed for the high-end market segments with composers who have TBs of storage to throw at these libraries would have been delivered this way since a decade or more ago.
Libraries like PH2 are not new releases.
Also, many people have both PHCE and PH2. You can load equivalent patches and you won't hear any audible difference between them. PHCE delivers 16-Bit 44.1KHz samples
East West used to have a Platinum Plus SKU for Symphonic Orchestra where they delivered both 16- and 24-Bit samples that you could switch between to save RAM and decrease load times/CPU use for this reason.