I didn't actually know about the Nortel deal, so that was a great tip.
I just read up on it. In the deal, Apple bought Nortel's patents, not Nortel's talent.
If you remember, the patent wars between the big tech companies were in full swing around that 2010-2012, and all indications are that Apple outbid Google and others to give themselves leverage against other patent holders.
Not sure what you "read up on", but Apple didn't buy Nortel's patents. A new patent troll company that Apple/Microsoft/RIM created did.
"...
The Department of Justice briefly investigated both Apple's and Google's attempts to bid on the Nortel portfolio for potential antitrust concerns. However, it gave both companies, as well as Intel, the green light to move forward with bids last week.
Bidding began on Monday, and today it was revealed that a group of companies comprised of Apple, EMC, Ericsson, Microsoft, RIM, and Sony won the auction for $4.5 billion. ..."
https://arstechnica.com/gadgets/2011/07/apple-ms-rim-nab-nortel-mobile-patents-for-45-billion/
Apple primarily bought the patents to throw a roadblock in from of Google/Android. That's one reason DOJ was sniffing around this. There is a fig leaf where they join up with other partners to seriously overpay to block because the patents end up being "held" by a subsidiary that gives access to a competitive group of companies. So can hand wave about how this didn't diminish marketplace competitiveness.
I'm skeptical that patent troll company ever made back that money in a timely fashion. I doubt it was ever intended to make that money back.
Google turned around and eventually spent even more to buy up Motorola. That chopped Motorola up into pieces. Google eventually tossed the what they had left of Motorola to Lenovo ( execept for key Moto patents )
Note also in same article.
"... It's worth noting that a similar consortium comprised of Microsoft, Apple, EMC, and Oracle acquired 882 patents from Novell late last year when the company agreed to be acquired by software vendor Attachmate. Those patents gave Apple, Microsoft, and Oracle (embroiled in its own lawsuit with Google over Java) additional leverage against the Android operating system. ..."
Apple isn't biding time to jump into the big time network file server business with those Novell patents. There was some basic client-server processes covered into those that a phone as a client on a network would probably need to do as a "internet connected" device.
When large tech companies are dealing with patents it often boils down to a contest of "My pile of patents is bigger than your pile". For non design patents isn't primarily about more/new products as much as "I've got something in my stack that you are infringing on also so lets talk about swapping infringements or a relatively small payment".
So when a tech company is in decline it can be a contest of who swoops in and buys an add-on to their "big stack" to make it a "bigger stack". These consortium subsidiaries are more so can make "I'll have my side-piece attack dog go after you also ... so effectively my pile is bigger than you think."
Very few big players buy up patents as a segue of entering a business. Most often they just enter and follow a "better to ask forgiveness than permission" path of development ( except for obvious and commonly well know patents ; e.g. a major part of a common standard process)
Those "patent wars" where Apple was pooling money to buy up blocks and stuff them into patent trolls instruments ... that is more about "building bigger moats " around their existing products than creating new ones. More Defensive, not offensive moves. [ there is a relatively small income stream but not the outsized money that these mega pools were paying. ]