Want proof? Here it is
The following has the Status 'Base' that require 'Passengers' <kuid:-3:11062>
Achievement Variable updater for Driver Achievements <kuid:447264:1005>
The following has the Status 'Built-In' that require 'Passengers' <kuid:-3:11062>
3DZ DB Avmc IC '71 (TC) <kuid2:212731:500041:3>
10:18 Carlisle Skipton <kuid2:69379:100013:6>
10:18 Carlisle Skipton (Ride) <kuid2:69379:100034:5>
1930s Cornish Mainline and Branches - Truro to Penzance <kuid2:515942:100004:1>
- People Monitor <kuid2:70791:35500:1>
Airport Domestic <kuid2:60238:38577:3>
Airport Lukla Control Tower New <kuid2:60238:38629:1>
Airport Lukla Terminal Building <kuid2:60238:38632:2>
Airport Module 2 Main Building <kuid2:60238:38610:2>
AJS Invisible Station 1T 3.5 <kuid2:122285:3401:22>
AJS Invisible Station 2T 3.5 <kuid2:122285:3402:20>
AJS Station 1x50s <kuid2:122285:3330:20>
AJS Station 1x50s, no ambient sound <kuid:368725:25015>
AJS Station 1x50sQ <kuid2:122285:3335:21>
AJS Station 1x110s <kuid2:122285:3320:21>
Appleby Shunting <kuid2:69379:100033:5>
Appleby Shunting (Ride) <kuid2:69379:100024:4>
Autodrive <kuid2:192081:4:5>
Avis Yard Work <kuid2:453099:100424:12>
Balezino to Mosti - Day Passenger 628 <kuid2:661281:110028:3>
Balezino to Mosti - Night Passenger 618 <kuid2:661281:110025:3>
Bell 412EP Helicopter <kuid2:60238:9499:1>
BR Blue/Grey MK2d BSO <kuid2:116035:236:2>
BR Blue/Grey MK2d FK <kuid2:116035:240:2>
BR Blue/Grey MK2d FO <kuid2:116035:239:2>
BR Blue/Grey MK2d TSO <kuid2:116035:237:2>
BR Blue/Grey MK2f BSO <kuid2:116035:232:1>
BR Blue/Grey MK2f FO <kuid2:116035:233:2>
BR Blue/Grey MK2f TSO <kuid2:116035:231:4>
BR Class 105 DMB <kuid2:79563:10501:2>
BR Class 105 DTCL <kuid2:79563:10502:2>
BR Class 116 DMBS blue grey <kuid2:283805:116003:1>
BR Class 116 DMS blue grey <kuid2:283805:116001:1>
BR Class 116 TS blue grey <kuid:283805:116004>
BR Class 117 DMBS blue grey <kuid2:283805:117002:2>
BR Class 117 DMS blue grey <kuid2:283805:117001:1>
BR Class 117 TCL blue grey <kuid2:283805:117003:1>
And this is 1 of 1 items with the Status 'Base', 38 of 398 items with the Status 'Built-In'. Unlisted are 2 items with the Status 'Built-In, Missing Dependencies', 4 items with the Status 'Built-In, Obsolete', another 4 items with the Status 'Installed from DLS', another 122 items with the Status 'Installed, Payware', and 2 items with the Status 'Modified', for a total of 533 items I have in TRS 2019.
Broken down by 'type', there is 1 Building, 84 Industries, 1 Misc, 18 Routes, 1 Script, 68 Sessions, and 360 Trains.