It is not completely true, however after expiring the trial version you will be able to open your iwork document but can't edit it. In this situation for the iWork recovery you need to upgrade your iWork.
A 30 day trial version of iWork '09 can be downloaded from the Apple website. (See links below)
One can download iWork from the Apple App Store. The latest version was released in 2009. However, Apple did release iWork for the iPad in 2010 as three separate applications.
All previous iWork files are readable by late copies of iWork but upon opening them you have to save them to the new format of that version of iWork. For example an iWork '06 document opened in iWork '08 will have to be saved as an iWork '08 document upon opening it, which means you will not be able to open it in a previous version of iWork
No.
A 30 day trial version of iWork can be downloaded from Apple's website (See links below).
If you ask them and pay for it local Apple stores will sell you a MacBook with iWork preinstalled but only a demo version of iWork is usually supplied with a new Mac.
iWork is compatible with macOS and iOS devices, allowing users to create and edit documents, spreadsheets, and presentations on Macs, iPhones, and iPads. Additionally, iWork files can be exported in various formats, including Microsoft Office formats (such as .docx and .xlsx), making it easier to share and collaborate with users of other software. iWork also has a web-based version accessible through iCloud, enabling cross-device functionality.
I don't think there is a version of iWork for Windows. However, with iWork '09 now going online, it is possible that Apple will be letting Windows users use the service.
iWork 09 is installed into it's own iWork 09 folder in the Applications folder. It should not touch an iWork 08 installation.
IWork was created on 2005-01-11.
All Macs come with a free-trial of iWork (the version is the year that your purchased your product in), if your computer does not have this free trial, you can download it from Apple at: www.apple.com/iwork/You can purchase a serial number or box version of iWork for full functionality, it has all the features of Microsoft Office Word/Excel/Powerpoint, plus cross-platform compatibility, a large range of design options, an easier to understand user interface, and costs less.
No, you can get iWork instead which lets you convert things you create into Microsoft Office documents.