Old English = Beowulf. Sample: Hwæt. We Gardena in geardagum, / þeodcyninga, þrym gefrunon, / hu ða æþelingas ellen fremedon. Dates to: 449–1066-ish. Declined language with three grammatical gender forms for adjectives and nouns. Uses three grammatical numbers: singular, plural, and dual. Uses letters like thorn, edh, ash, and yogh.
Middle English = Canterbury Tales or Sir Gawain and the Green Knight. Sample: Siþen þe sege and þe assaut watz sesed at troye / þe bor3 brittened and brent to brondez and askez / þe tulk þat þe trammes of tresoun þer wro3t/ watz tried for his tricherie þe trewest on erþe. Dates to: 1066-ish to 1400-ish. Increasingly analytic language; no standardized spellings, but has not yet gone through the Great Vowel Shift. Still uses letters like thorn, edh, ash, and yogh but digraphs like <th> and <gh> beginning to replace them.
Early Modern English = Shakespeare’s The Tempest. Sample: I have with such provision in mine art / So safely ordered that there is no soul— /No, not so much perdition as an hair /Betid to any creature in the vessel / Which thou heard'st cry, which thou saw'st sink. Sit down; / For thou must now know farther. Dates to: 1450–1799-ish. Closer to Modern pronunciation. Readable, but still uses words we would consider archaic. Still makes distinction between Ye/You/Thou and other pronouns.
Late Modern English = English in the last 200 years. Sample: You are speaking it. Dates to: 1800-now.
The answer is English, and language in general, has never remained static and continues to evolve through the centuries. In the last 30 years, we’ve witnessed some of the most dramatic changes in communication in the history of mankind, thanks to the Internet, smart phones (texting), and social media, and it’s just going to continue to accelerate from here.
Bus driver, let me off at the next stop. Skibidi.