100 Modern Things It'd Be Messed Up to Put in Your Setting

Supplemental links:
https://en.wikipedia.org/wiki/Timeline_of_historic_inventions
https://en.wikipedia.org/wiki/List_of_spurious_inventions
https://en.wikipedia.org/wiki/List_of_lost_inventions

1. Great pacific garbage patch
2. Neodymium magnets
3. Synthetic gemstones
4. Factory farming
5. Kola Superdeep Borehole
6. Spy satellites
7. Nuclear submarines
8. Orthodontics
9. Radio stations
10. Soda
11. SETI
12. Contact lenses
13. Cell phones (alternatively: landlines only)
14. Record players
15. X-rays
16. Skyscrapers
17. Neon signs
18. Meteorology
19. Billboards
20. Hydroelectric dams
21. Mustard gas
22. Plastic
23. Deep sea cables
24. Steamships (esp. icebreakers)
25. Programming languages (but not necessarily computers)
26. Email
27. Standardized tests
28. Ski lifts
29. Large hadron collider
30. Molecular gastronomy
31. Oil wells, offshore drilling
32. Social media addiction
33. Quadcopters
34. Wildlife tracking collars
35. Triangulation
36. Handheld video game consoles
37. Air pollution (pea soup fog)
38. Cryonics
39. Department stores
40. Vaccines
41. Organ transplants
42. Solar farms
43. Machine guns
44. Dynamite
45. Wikipedia
46. Water towers
47. Motorcycles
48. Acid rain
49. Ozone depletion
50. Solar flares
51. VR/AR
52. ATMs
53. Vending machines. Claw machines?
54. Film photography
55. Spray paint
56. Absolute zero
57. Movie projectors
58. Biplanes
59. Fiber optics
60. Mutually assured destruction
61. Guillotine
62. Canned food
63. Arms races; the manhattan project
64. Blast furnaces
65. Model trains
66. Y2K
67. Fingerprint analysis
68. Academic journals
69. Yearly checkups
70. Inhalers
71. Cybersecurity
72. Voyager 1
73. Microplastics
74. UV light
75. Cosmetic surgery
76. Carbon dating
77. Freudian/Jungian/etc theories of the psyche
78. Microchip implants (like for pets)
79. Junk mail
80. Anti-homeless architecture
81. Brain surgery
82. ICBMs
83. Bottled water
84. Identification documents - passports, birth certificates, state ID cards, etc.
85. fMRI
86. Motion detectors
87. Sleep studies
88. Hermetic seals
89. Global supply chains
90. Fog machines
91. Land mines
92. Cloning
93. Cigarettes
94. Gene drives
95. Pesticide runoff
96. 24 hour news
97. Freeze dried food
98. Thrift stores
99. Phone books
100. Periodic table of elements