This is the most critical point. After SketchUp Pro 2018, Trimble moved fully to a subscription-only model (annual fee). However, SketchUp Pro 2018 was the final version available for purchase as a perpetual license.
Thousands of small firms and freelancers still use 2018 because they refuse to pay monthly fees for basic modeling. If your workflow doesn't require cloud storage or the newer 3D Warehouse online integration, 2018 is perfectly capable. sketchup pro 2018
While newer versions exist, 2018 introduced these now-standard features: This is the most critical point
Go to Window > Preferences > Templates.
Choose "Architectural Inches" or "Construction Millimeters." 2018 introduced cleaner default styles (no more cartoon-like sky gradients). Thousands of small firms and freelancers still use