You know how I know we live in a uni­code world now? Of the 300+ uni­code ar­rows, all dis­play cor­rect­ly by de­fault on Win­dows, Mac and Ubun­tu, ex­cept maybe ~25.

← → ↑ ↓ ↔ ↕ ↖ ↗ ↘ ↙ ↮ ⇦ ⇨ ⇧ ⇩ ⬄ ⇳ ⬀ ⬁ ⬂ ⬃ ⬅ ➡ ⬆ ⬇ ⬈ ⬉ ⬊ ⬋ ⬌ ⬍ ⇐ ⇒ ⇑ ⇓ ⇔ ⇕ ⇖ ⇗ ⇘ ⇙ ⇍ ⇏ ⇎ ⟸ ⟹ ⟺ ↤ ↦ ↥ ↧ ⇤ ⇥ ⤒ ⤓ ↨ ⇆ ⇄ ⇅ ⇵ ⇈ ⇊ ⇇ ⇉ ⇠ ⇢ ⇡ ⇣ ⇚ ⇛ ⤊ ⤋ ⭅ ⭆ ⟰ ⟱ ↩ ↪ ↫ ↬ ↞ ↟ ↠ ↡ ↚ ↛ ↜ ↝ ↢ ↣ ↰ ↱ ↲ ↳ ⬐ ⬎ ⬑ ⬏ ↴ ↵ ↺ ↻ ⥀ ⥁ ⟲ ⟳ ↶ ↷ ⤾ ⤿ ⤸ ⤹ ⤺ ⤻ ↼ ⇀ ↿ ↾ ↽ ⇁ ⇂ ⇃ ⇋ ⇌ ⇜ ⇝ ⇽ ⇾ ⇿ ⟻ ⟼ ⟵ ⟶ ⟷ ⬳ ⟿ ⬱ ⇶ ⥊ ⥋ ⥌ ⥍ ⥎ ⥏ ⥐ ⥑ ⥒ ⥓ ⥔ ⥕ ⥖ ⥗ ⥘ ⥙ ⥚ ⥛ ⥜ ⥝ ⥞ ⥟ ⥠ ⥡ ⥢ ⥣ ⥤ ⥥ ⥦ ⥨ ⥧ ⥩ ⥮ ⥯ ⥪ ⥫ ⥬ ⥭ ⇷ ⇸ ⤉ ⤈ ⇹ ⇺ ⇻ ⇞ ⇟ ⇼ ⬴ ⤀ ⬵ ⤁ ⬹ ⤔ ⬺ ⤕ ⤂ ⤃ ⤄ ⬶ ⤅ ⬻ ⤖ ⬼ ⤗ ⬽ ⤘ ⤆ ⤇ ⤌ ⤍ ⤎ ⤏ ⤙ ⤚ ⤛ ⤜ ⤝ ⤞ ⤟ ⤠ ⤡ ⤢ ⤣ ⤤ ⤥ ⤦ ⤪ ⤨ ⤧ ⤩ ⤭ ⤮ ⤯ ⤰ ⤱ ⤲ ⤫ ⤬ ⥼ ⥽ ⥾ ⥿ ⤶ ⤷ ⤴ ⤵ ⤼ ⤽ ⥂ ⥃ ⥄ ⭀ ⥱ ⥶ ⥸ ⭂ ⭈ ⭊ ⥵ ⭁ ⭇ ⭉ ⥲ ⭋ ⭌ ⥳ ⥴ ⥆ ⥅ ⬷ ⤐ ⬸ ⤑ ⬿ ⤳ ⥹ ⥻ ⬰ ⇴ ⥈ ⬾ ⥇ ⬲ ⟴ ⥷ ⭃ ⥺ ⭄ ⇱ ⇲ ↸ ↹ ↯ ↭ ⥉ ⥰ ☚ ☛ ☜ ☝ ☞ ☟ ◄ ► ⇪ ⇫ ⇬ ⇭ ⇮ ⇯ ⇰ ➔ ➘ ➙ ➚ ➛ ➜ ➝ ➞ ➟ ➠ ➡ ➢ ➣ ➤ ➥ ➦ ➧ ➨ ➩ ➪ ➫ ➬ ➭ ➮ ➯ ➱ ➲ ➳ ➴ ➵ ➶ ➷ ➸ ➹ ➺ ➻ ➼ ➽ ➾

A few years ago, many apps and fonts were con­fused by sim­ple let­ters with di­a­crit­ics like á. So, yes, re­al progress hap­pen­s.