No problem. I just thought I’d suggest it as it may give your wife’s iMac a couple of years additional use at which point you can safely upgrade to a rev B Apple Silicon iMac.
To be honest unless you:
- Are running a business from your iMac
- Require Bootcamp
- Have important software that needs to run at native speed and may not be transitioned to run natively on Apple Silicon for a while
- Like Intel/the architecture/want to own one of the last ever Intel Macs
Then I would avoid buying a new Intel iMac now. As far as Apple Macs are concerned it’s effectively an end of life architecture. It’s impossible to say how long it would continue to receive software updates and the newest OS as things have changed a lot since 2005, but as an example, PPC Macs sold as late as 2006 could not run Snow Leopard released in 2009. They did continue to receive Leopard security updates until 2011.
It may be completely different this time and I may be spreading unnecessary fear, for which I apologise in advance, but a 27” iMac is a lot of money to spend. And based on the fact that your wife still uses her 2009 iMac and you have a 2015, I’d imagine you’d want at least 5 or 6 years from any purchase you make.
One other consideration is that High Sierra will officially reach its end of life status later this year. This means it won’t receive further security updates. This may be a problem for you, it may not, but it’s good to be aware of it.