You don't need an expensive Adobe subscription to open Illustrator files. Here's are three free or low-cost alternative ways ...

Here are some good free software that you can use to open and view files that are large in size without any lag on your Windows 11/10 PC.

It is primarily a universal file viewer that enables you to view various file types in one software. You can also view ARW and some other RAW images like CRW, CR2, BAY, CS1, DCR, DC2, RAF, etc.