Hi @mcramblitt:
Photoshop just released v26 so perhaps that is the source of the confusion. As per @James Gifford—NitroPress, InDesign v20 is the lastest version. Both fall under the "2025, October 2024" umbrella, so this is endlessly confusing.
Here are the system requirements for InDesign 2025, October 2024 release (aka v20): https://helpx.adobe.com/indesign/system-requirements.html.
I'm thinking you have already seen this and understand that your older processor is no longer supported. Keeping in mind that we are users like you who don't know exactly what Adobe has in store for future versions, we can make an educated guess that Adobe will continue the march forward, focusing on supporting newer systems and not trying to maintain backward compatibility.
Until you are ready for a new computer, I'd stick with the previous version of InDesign, which will continue to run.
~Barb
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