The estimated useful lives are as follows:
Estimated Useful Life
Computer equipment and software
3 and 5 years
Machinery and equipment
Lesser of 10 years or remaining lease period
Vehicles and aviation
5 and 20 years
Leasehold and land improvements
Lesser of 15 years or remaining lease period
Buildings, structures and recharge sites
Lesser of 40 years or remaining lease period
Lesser of 10 years or remaining lease period for recharge sites
Property and equipment, net consisted of the following (in thousands):
As of December 31,
20252024
Buildings, structures and recharge sites
$209,556 $194,103 
Machinery and equipment 94,137 79,639 
Leasehold and land improvements
33,667 27,720 
Vehicles and aviation 26,512 15,546 
Computer equipment and software
18,413 12,194 
Construction in progress 20,580 22,914 
402,865 352,116 
Less: accumulated depreciation (54,325)(32,528)
Property and equipment, net$348,540 $319,588 

About PP&E Disclosures

The PP&E disclosure details a company's physical asset base — land, buildings, machinery, and equipment — along with the depreciation methods and useful life assumptions that determine how these costs flow through the income statement. Capitalization policy thresholds reveal management's judgment on the boundary between expense and asset, directly affecting both reported earnings and asset values.

Key signals: changes in estimated useful lives or depreciation methods can materially shift reported earnings without any operational change. Compare capital expenditures against depreciation expense — when capex consistently trails depreciation, the asset base may be aging and underinvested. Watch for large asset impairments or write-downs that signal overvalued carrying amounts. Asset retirement obligations reveal future environmental or decommissioning costs that are often underappreciated. Compare PP&E intensity (PP&E-to-revenue) against industry peers to assess capital efficiency and competitive positioning.