I can understand those that only want permissive licensed software for components. This make sense, as otherwise the copyright license will put some requirements when distributing copies of the new work. If its proprietary components, you got to buy a license. If its copyleft components, you got to use a particular license.
But if we are talking about gplv2 vs gplv3, only a very small subset of people will ever have to care about the differences between those two licenses. It actually only comes down to two questions.
1: Are you planning to sell a product, but want to keep root access to the device after its being sold, while at the same time directly preventing giving the same access to the new owner who bought your device?
2: Are you in a patent license agreement with an other company over patents you pay for and which cover aspect of the new product?
If your answer is No and No, to those two questions, you can regard GPLv2 and GPLv3 as identical licenses. Its that simple.
I doubt this is rare inside of large corporations.
For code contributions, GPLv2, GPLv3 and Apache license has the exact same deal in regard to patent grants. Actually, the text used in GPLv3 that cover patent grants of contributors, is word for word copied out of the Apache license. GPLv3 only added additional patent requirements for distribution of the complete work. My guess, for the exact reason of not discouraging companies to contribute code.
If the company review GPLv3 contributions, but do not review Apache licensed contributions, they have bitten the FUD apple.
Not only for contributing, but for using as well, and with every single version change the same process must be followed.
If your in a situation where you want to use someones else project, and would be willing to pay per unit to distribute it to your users, what would you pick. A patent deal to get the privilege to distribute a GPLv2 program, or a supported and legal protected proprietary program? I would pick option 3, ie, write my own program or fight the patent depending on which ever is affordable. In this regard, what license the original program was in matter very little if at all.